mirror of
https://github.com/golang/go
synced 2024-11-26 04:17:59 -07:00
cmd/compile: make interface conversion function selection ABI insensitive
Before register ABI, we always pass argument in memory, and the
compiler chooses interface conversion functions solely based on
the memory layout. As long as the two types have identical memory
layout, it is fine to mix and match, e.g. convT64 takes a uint64
argument, but it can be used for things like float64 or
struct { x [4]struct{}; y int64 }.
With register ABI, those types may be passed differently, e.g.
uint64 is passed in an integer register, float64 is passed in a
floating point register, the struct above is passed in memory.
I made a few attempts in the previous CLs to try to choose the
right function based on the argument type, but none of them is
really correct.
Instead, this CL changes it to always pass the argument in the
same type the runtime expects, and do conversion before the call
in the compiler. The conversion can be no-op (e.g. a named type
to its underlying type), direct (e.g. int64 to uint64), or
through memory (e.g. *(*uint64)(unsafe.Pointer(&arg))). This way,
the front end does not need to know the ABI. (It only needs to
know how to convert types, and it already does.)
TODO: do something similar for map functions.
Change-Id: I33fc780a47c3f332b765e09b5e527f52ea1d6b5c
Reviewed-on: https://go-review.googlesource.com/c/go/+/309029
Trust: Cherry Zhang <cherryyz@google.com>
Reviewed-by: David Chase <drchase@google.com>
This commit is contained in:
Cherry Zhang
parent
841bc14216
commit
49e933fc57
@ -71,135 +71,133 @@ var runtimeDecls = [...]struct {
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{"decoderune", funcTag, 55},
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{"countrunes", funcTag, 56},
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{"convI2I", funcTag, 57},
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{"convT16", funcTag, 58},
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{"convT32", funcTag, 58},
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{"convT32F", funcTag, 58},
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{"convT64", funcTag, 58},
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{"convT64F", funcTag, 58},
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{"convTstring", funcTag, 58},
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{"convTslice", funcTag, 58},
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{"convT2E", funcTag, 59},
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{"convT2Enoptr", funcTag, 59},
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{"convT2I", funcTag, 59},
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{"convT2Inoptr", funcTag, 59},
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{"assertE2I", funcTag, 60},
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{"convT16", funcTag, 59},
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{"convT32", funcTag, 61},
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{"convT64", funcTag, 62},
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{"convTstring", funcTag, 63},
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{"convTslice", funcTag, 66},
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{"convT2E", funcTag, 67},
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{"convT2Enoptr", funcTag, 67},
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{"convT2I", funcTag, 67},
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{"convT2Inoptr", funcTag, 67},
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{"assertE2I", funcTag, 68},
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{"assertE2I2", funcTag, 57},
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{"assertI2I", funcTag, 60},
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{"assertI2I", funcTag, 68},
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{"assertI2I2", funcTag, 57},
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{"panicdottypeE", funcTag, 61},
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{"panicdottypeI", funcTag, 61},
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{"panicnildottype", funcTag, 62},
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{"ifaceeq", funcTag, 64},
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{"efaceeq", funcTag, 64},
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{"fastrand", funcTag, 66},
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{"makemap64", funcTag, 68},
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{"makemap", funcTag, 69},
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{"makemap_small", funcTag, 70},
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{"mapaccess1", funcTag, 71},
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{"mapaccess1_fast32", funcTag, 72},
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{"mapaccess1_fast64", funcTag, 72},
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{"mapaccess1_faststr", funcTag, 72},
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{"mapaccess1_fat", funcTag, 73},
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{"mapaccess2", funcTag, 74},
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{"mapaccess2_fast32", funcTag, 75},
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{"mapaccess2_fast64", funcTag, 75},
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{"mapaccess2_faststr", funcTag, 75},
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{"mapaccess2_fat", funcTag, 76},
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{"mapassign", funcTag, 71},
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{"mapassign_fast32", funcTag, 72},
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{"mapassign_fast32ptr", funcTag, 72},
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{"mapassign_fast64", funcTag, 72},
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{"mapassign_fast64ptr", funcTag, 72},
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{"mapassign_faststr", funcTag, 72},
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{"mapiterinit", funcTag, 77},
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{"mapdelete", funcTag, 77},
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{"mapdelete_fast32", funcTag, 78},
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{"mapdelete_fast64", funcTag, 78},
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{"mapdelete_faststr", funcTag, 78},
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{"mapiternext", funcTag, 79},
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{"mapclear", funcTag, 80},
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{"makechan64", funcTag, 82},
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{"makechan", funcTag, 83},
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{"chanrecv1", funcTag, 85},
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{"chanrecv2", funcTag, 86},
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{"chansend1", funcTag, 88},
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{"panicdottypeE", funcTag, 69},
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{"panicdottypeI", funcTag, 69},
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{"panicnildottype", funcTag, 70},
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{"ifaceeq", funcTag, 72},
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{"efaceeq", funcTag, 72},
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{"fastrand", funcTag, 73},
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{"makemap64", funcTag, 75},
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{"makemap", funcTag, 76},
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{"makemap_small", funcTag, 77},
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{"mapaccess1", funcTag, 78},
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{"mapaccess1_fast32", funcTag, 79},
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{"mapaccess1_fast64", funcTag, 79},
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{"mapaccess1_faststr", funcTag, 79},
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{"mapaccess1_fat", funcTag, 80},
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{"mapaccess2", funcTag, 81},
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{"mapaccess2_fast32", funcTag, 82},
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{"mapaccess2_fast64", funcTag, 82},
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{"mapaccess2_faststr", funcTag, 82},
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{"mapaccess2_fat", funcTag, 83},
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{"mapassign", funcTag, 78},
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{"mapassign_fast32", funcTag, 79},
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{"mapassign_fast32ptr", funcTag, 79},
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{"mapassign_fast64", funcTag, 79},
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{"mapassign_fast64ptr", funcTag, 79},
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{"mapassign_faststr", funcTag, 79},
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{"mapiterinit", funcTag, 84},
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{"mapdelete", funcTag, 84},
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{"mapdelete_fast32", funcTag, 85},
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{"mapdelete_fast64", funcTag, 85},
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{"mapdelete_faststr", funcTag, 85},
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{"mapiternext", funcTag, 86},
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{"mapclear", funcTag, 87},
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{"makechan64", funcTag, 89},
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{"makechan", funcTag, 90},
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{"chanrecv1", funcTag, 92},
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{"chanrecv2", funcTag, 93},
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{"chansend1", funcTag, 95},
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{"closechan", funcTag, 30},
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{"writeBarrier", varTag, 90},
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{"typedmemmove", funcTag, 91},
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{"typedmemclr", funcTag, 92},
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{"typedslicecopy", funcTag, 93},
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{"selectnbsend", funcTag, 94},
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{"selectnbrecv", funcTag, 95},
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{"selectsetpc", funcTag, 96},
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{"selectgo", funcTag, 97},
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{"writeBarrier", varTag, 97},
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{"typedmemmove", funcTag, 98},
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{"typedmemclr", funcTag, 99},
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{"typedslicecopy", funcTag, 100},
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{"selectnbsend", funcTag, 101},
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{"selectnbrecv", funcTag, 102},
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{"selectsetpc", funcTag, 103},
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{"selectgo", funcTag, 104},
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{"block", funcTag, 9},
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{"makeslice", funcTag, 98},
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{"makeslice64", funcTag, 99},
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{"makeslicecopy", funcTag, 100},
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{"growslice", funcTag, 102},
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{"memmove", funcTag, 103},
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{"memclrNoHeapPointers", funcTag, 104},
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{"memclrHasPointers", funcTag, 104},
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{"memequal", funcTag, 105},
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{"memequal0", funcTag, 106},
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{"memequal8", funcTag, 106},
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{"memequal16", funcTag, 106},
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{"memequal32", funcTag, 106},
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{"memequal64", funcTag, 106},
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{"memequal128", funcTag, 106},
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{"f32equal", funcTag, 107},
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{"f64equal", funcTag, 107},
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{"c64equal", funcTag, 107},
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{"c128equal", funcTag, 107},
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{"strequal", funcTag, 107},
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{"interequal", funcTag, 107},
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{"nilinterequal", funcTag, 107},
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{"memhash", funcTag, 108},
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{"memhash0", funcTag, 109},
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{"memhash8", funcTag, 109},
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{"memhash16", funcTag, 109},
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{"memhash32", funcTag, 109},
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{"memhash64", funcTag, 109},
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{"memhash128", funcTag, 109},
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{"f32hash", funcTag, 109},
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{"f64hash", funcTag, 109},
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{"c64hash", funcTag, 109},
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{"c128hash", funcTag, 109},
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{"strhash", funcTag, 109},
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{"interhash", funcTag, 109},
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{"nilinterhash", funcTag, 109},
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{"int64div", funcTag, 110},
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{"uint64div", funcTag, 111},
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{"int64mod", funcTag, 110},
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{"uint64mod", funcTag, 111},
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{"float64toint64", funcTag, 112},
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{"float64touint64", funcTag, 113},
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{"float64touint32", funcTag, 114},
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{"int64tofloat64", funcTag, 115},
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{"uint64tofloat64", funcTag, 116},
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{"uint32tofloat64", funcTag, 117},
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{"complex128div", funcTag, 118},
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{"getcallerpc", funcTag, 119},
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{"getcallersp", funcTag, 119},
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{"makeslice", funcTag, 105},
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{"makeslice64", funcTag, 106},
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{"makeslicecopy", funcTag, 107},
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{"growslice", funcTag, 109},
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{"memmove", funcTag, 110},
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{"memclrNoHeapPointers", funcTag, 111},
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{"memclrHasPointers", funcTag, 111},
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{"memequal", funcTag, 112},
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{"memequal0", funcTag, 113},
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{"memequal8", funcTag, 113},
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{"memequal16", funcTag, 113},
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{"memequal32", funcTag, 113},
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{"memequal64", funcTag, 113},
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{"memequal128", funcTag, 113},
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{"f32equal", funcTag, 114},
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{"f64equal", funcTag, 114},
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{"c64equal", funcTag, 114},
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{"c128equal", funcTag, 114},
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{"strequal", funcTag, 114},
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{"interequal", funcTag, 114},
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{"nilinterequal", funcTag, 114},
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{"memhash", funcTag, 115},
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{"memhash0", funcTag, 116},
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{"memhash8", funcTag, 116},
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{"memhash16", funcTag, 116},
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{"memhash32", funcTag, 116},
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{"memhash64", funcTag, 116},
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{"memhash128", funcTag, 116},
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{"f32hash", funcTag, 116},
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{"f64hash", funcTag, 116},
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{"c64hash", funcTag, 116},
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{"c128hash", funcTag, 116},
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{"strhash", funcTag, 116},
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{"interhash", funcTag, 116},
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{"nilinterhash", funcTag, 116},
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{"int64div", funcTag, 117},
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{"uint64div", funcTag, 118},
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{"int64mod", funcTag, 117},
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{"uint64mod", funcTag, 118},
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{"float64toint64", funcTag, 119},
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{"float64touint64", funcTag, 120},
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{"float64touint32", funcTag, 121},
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{"int64tofloat64", funcTag, 122},
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{"uint64tofloat64", funcTag, 123},
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{"uint32tofloat64", funcTag, 124},
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{"complex128div", funcTag, 125},
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{"getcallerpc", funcTag, 126},
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{"getcallersp", funcTag, 126},
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{"racefuncenter", funcTag, 31},
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{"racefuncexit", funcTag, 9},
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{"raceread", funcTag, 31},
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{"racewrite", funcTag, 31},
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{"racereadrange", funcTag, 120},
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{"racewriterange", funcTag, 120},
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{"msanread", funcTag, 120},
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{"msanwrite", funcTag, 120},
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{"msanmove", funcTag, 121},
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{"checkptrAlignment", funcTag, 122},
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{"checkptrArithmetic", funcTag, 124},
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{"libfuzzerTraceCmp1", funcTag, 126},
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{"libfuzzerTraceCmp2", funcTag, 128},
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{"libfuzzerTraceCmp4", funcTag, 129},
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{"libfuzzerTraceCmp8", funcTag, 130},
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{"libfuzzerTraceConstCmp1", funcTag, 126},
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{"libfuzzerTraceConstCmp2", funcTag, 128},
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{"libfuzzerTraceConstCmp4", funcTag, 129},
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{"libfuzzerTraceConstCmp8", funcTag, 130},
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{"racereadrange", funcTag, 127},
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{"racewriterange", funcTag, 127},
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{"msanread", funcTag, 127},
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{"msanwrite", funcTag, 127},
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{"msanmove", funcTag, 128},
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{"checkptrAlignment", funcTag, 129},
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{"checkptrArithmetic", funcTag, 131},
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{"libfuzzerTraceCmp1", funcTag, 132},
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{"libfuzzerTraceCmp2", funcTag, 133},
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{"libfuzzerTraceCmp4", funcTag, 134},
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{"libfuzzerTraceCmp8", funcTag, 135},
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{"libfuzzerTraceConstCmp1", funcTag, 132},
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{"libfuzzerTraceConstCmp2", funcTag, 133},
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{"libfuzzerTraceConstCmp4", funcTag, 134},
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{"libfuzzerTraceConstCmp8", funcTag, 135},
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{"x86HasPOPCNT", varTag, 6},
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{"x86HasSSE41", varTag, 6},
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{"x86HasFMA", varTag, 6},
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@ -222,7 +220,7 @@ func params(tlist ...*types.Type) []*types.Field {
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}
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func runtimeTypes() []*types.Type {
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var typs [131]*types.Type
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var typs [136]*types.Type
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typs[0] = types.ByteType
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typs[1] = types.NewPtr(typs[0])
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typs[2] = types.Types[types.TANY]
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@ -281,78 +279,83 @@ func runtimeTypes() []*types.Type {
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typs[55] = newSig(params(typs[28], typs[15]), params(typs[46], typs[15]))
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typs[56] = newSig(params(typs[28]), params(typs[15]))
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typs[57] = newSig(params(typs[1], typs[2]), params(typs[2]))
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typs[58] = newSig(params(typs[2]), params(typs[7]))
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typs[59] = newSig(params(typs[1], typs[3]), params(typs[2]))
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typs[60] = newSig(params(typs[1], typs[1]), params(typs[1]))
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typs[61] = newSig(params(typs[1], typs[1], typs[1]), nil)
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typs[62] = newSig(params(typs[1]), nil)
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typs[63] = types.NewPtr(typs[5])
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typs[64] = newSig(params(typs[63], typs[7], typs[7]), params(typs[6]))
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typs[65] = types.Types[types.TUINT32]
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typs[66] = newSig(nil, params(typs[65]))
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typs[67] = types.NewMap(typs[2], typs[2])
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typs[68] = newSig(params(typs[1], typs[22], typs[3]), params(typs[67]))
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typs[69] = newSig(params(typs[1], typs[15], typs[3]), params(typs[67]))
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typs[70] = newSig(nil, params(typs[67]))
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typs[71] = newSig(params(typs[1], typs[67], typs[3]), params(typs[3]))
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typs[72] = newSig(params(typs[1], typs[67], typs[2]), params(typs[3]))
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typs[73] = newSig(params(typs[1], typs[67], typs[3], typs[1]), params(typs[3]))
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typs[74] = newSig(params(typs[1], typs[67], typs[3]), params(typs[3], typs[6]))
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typs[75] = newSig(params(typs[1], typs[67], typs[2]), params(typs[3], typs[6]))
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typs[76] = newSig(params(typs[1], typs[67], typs[3], typs[1]), params(typs[3], typs[6]))
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typs[77] = newSig(params(typs[1], typs[67], typs[3]), nil)
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typs[78] = newSig(params(typs[1], typs[67], typs[2]), nil)
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typs[79] = newSig(params(typs[3]), nil)
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typs[80] = newSig(params(typs[1], typs[67]), nil)
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typs[81] = types.NewChan(typs[2], types.Cboth)
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typs[82] = newSig(params(typs[1], typs[22]), params(typs[81]))
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typs[83] = newSig(params(typs[1], typs[15]), params(typs[81]))
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typs[84] = types.NewChan(typs[2], types.Crecv)
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typs[85] = newSig(params(typs[84], typs[3]), nil)
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typs[86] = newSig(params(typs[84], typs[3]), params(typs[6]))
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typs[87] = types.NewChan(typs[2], types.Csend)
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typs[88] = newSig(params(typs[87], typs[3]), nil)
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typs[89] = types.NewArray(typs[0], 3)
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typs[90] = types.NewStruct(types.NoPkg, []*types.Field{types.NewField(src.NoXPos, Lookup("enabled"), typs[6]), types.NewField(src.NoXPos, Lookup("pad"), typs[89]), types.NewField(src.NoXPos, Lookup("needed"), typs[6]), types.NewField(src.NoXPos, Lookup("cgo"), typs[6]), types.NewField(src.NoXPos, Lookup("alignme"), typs[24])})
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typs[91] = newSig(params(typs[1], typs[3], typs[3]), nil)
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typs[92] = newSig(params(typs[1], typs[3]), nil)
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typs[93] = newSig(params(typs[1], typs[3], typs[15], typs[3], typs[15]), params(typs[15]))
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typs[94] = newSig(params(typs[87], typs[3]), params(typs[6]))
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typs[95] = newSig(params(typs[3], typs[84]), params(typs[6], typs[6]))
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typs[96] = newSig(params(typs[63]), nil)
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typs[97] = newSig(params(typs[1], typs[1], typs[63], typs[15], typs[15], typs[6]), params(typs[15], typs[6]))
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typs[98] = newSig(params(typs[1], typs[15], typs[15]), params(typs[7]))
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typs[99] = newSig(params(typs[1], typs[22], typs[22]), params(typs[7]))
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typs[100] = newSig(params(typs[1], typs[15], typs[15], typs[7]), params(typs[7]))
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typs[101] = types.NewSlice(typs[2])
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typs[102] = newSig(params(typs[1], typs[101], typs[15]), params(typs[101]))
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typs[103] = newSig(params(typs[3], typs[3], typs[5]), nil)
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typs[104] = newSig(params(typs[7], typs[5]), nil)
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typs[105] = newSig(params(typs[3], typs[3], typs[5]), params(typs[6]))
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typs[106] = newSig(params(typs[3], typs[3]), params(typs[6]))
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typs[107] = newSig(params(typs[7], typs[7]), params(typs[6]))
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typs[108] = newSig(params(typs[7], typs[5], typs[5]), params(typs[5]))
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typs[109] = newSig(params(typs[7], typs[5]), params(typs[5]))
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typs[110] = newSig(params(typs[22], typs[22]), params(typs[22]))
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typs[111] = newSig(params(typs[24], typs[24]), params(typs[24]))
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typs[112] = newSig(params(typs[20]), params(typs[22]))
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typs[113] = newSig(params(typs[20]), params(typs[24]))
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typs[114] = newSig(params(typs[20]), params(typs[65]))
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typs[115] = newSig(params(typs[22]), params(typs[20]))
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typs[116] = newSig(params(typs[24]), params(typs[20]))
|
||||
typs[117] = newSig(params(typs[65]), params(typs[20]))
|
||||
typs[118] = newSig(params(typs[26], typs[26]), params(typs[26]))
|
||||
typs[119] = newSig(nil, params(typs[5]))
|
||||
typs[120] = newSig(params(typs[5], typs[5]), nil)
|
||||
typs[121] = newSig(params(typs[5], typs[5], typs[5]), nil)
|
||||
typs[122] = newSig(params(typs[7], typs[1], typs[5]), nil)
|
||||
typs[123] = types.NewSlice(typs[7])
|
||||
typs[124] = newSig(params(typs[7], typs[123]), nil)
|
||||
typs[125] = types.Types[types.TUINT8]
|
||||
typs[126] = newSig(params(typs[125], typs[125]), nil)
|
||||
typs[127] = types.Types[types.TUINT16]
|
||||
typs[128] = newSig(params(typs[127], typs[127]), nil)
|
||||
typs[129] = newSig(params(typs[65], typs[65]), nil)
|
||||
typs[130] = newSig(params(typs[24], typs[24]), nil)
|
||||
typs[58] = types.Types[types.TUINT16]
|
||||
typs[59] = newSig(params(typs[58]), params(typs[7]))
|
||||
typs[60] = types.Types[types.TUINT32]
|
||||
typs[61] = newSig(params(typs[60]), params(typs[7]))
|
||||
typs[62] = newSig(params(typs[24]), params(typs[7]))
|
||||
typs[63] = newSig(params(typs[28]), params(typs[7]))
|
||||
typs[64] = types.Types[types.TUINT8]
|
||||
typs[65] = types.NewSlice(typs[64])
|
||||
typs[66] = newSig(params(typs[65]), params(typs[7]))
|
||||
typs[67] = newSig(params(typs[1], typs[3]), params(typs[2]))
|
||||
typs[68] = newSig(params(typs[1], typs[1]), params(typs[1]))
|
||||
typs[69] = newSig(params(typs[1], typs[1], typs[1]), nil)
|
||||
typs[70] = newSig(params(typs[1]), nil)
|
||||
typs[71] = types.NewPtr(typs[5])
|
||||
typs[72] = newSig(params(typs[71], typs[7], typs[7]), params(typs[6]))
|
||||
typs[73] = newSig(nil, params(typs[60]))
|
||||
typs[74] = types.NewMap(typs[2], typs[2])
|
||||
typs[75] = newSig(params(typs[1], typs[22], typs[3]), params(typs[74]))
|
||||
typs[76] = newSig(params(typs[1], typs[15], typs[3]), params(typs[74]))
|
||||
typs[77] = newSig(nil, params(typs[74]))
|
||||
typs[78] = newSig(params(typs[1], typs[74], typs[3]), params(typs[3]))
|
||||
typs[79] = newSig(params(typs[1], typs[74], typs[2]), params(typs[3]))
|
||||
typs[80] = newSig(params(typs[1], typs[74], typs[3], typs[1]), params(typs[3]))
|
||||
typs[81] = newSig(params(typs[1], typs[74], typs[3]), params(typs[3], typs[6]))
|
||||
typs[82] = newSig(params(typs[1], typs[74], typs[2]), params(typs[3], typs[6]))
|
||||
typs[83] = newSig(params(typs[1], typs[74], typs[3], typs[1]), params(typs[3], typs[6]))
|
||||
typs[84] = newSig(params(typs[1], typs[74], typs[3]), nil)
|
||||
typs[85] = newSig(params(typs[1], typs[74], typs[2]), nil)
|
||||
typs[86] = newSig(params(typs[3]), nil)
|
||||
typs[87] = newSig(params(typs[1], typs[74]), nil)
|
||||
typs[88] = types.NewChan(typs[2], types.Cboth)
|
||||
typs[89] = newSig(params(typs[1], typs[22]), params(typs[88]))
|
||||
typs[90] = newSig(params(typs[1], typs[15]), params(typs[88]))
|
||||
typs[91] = types.NewChan(typs[2], types.Crecv)
|
||||
typs[92] = newSig(params(typs[91], typs[3]), nil)
|
||||
typs[93] = newSig(params(typs[91], typs[3]), params(typs[6]))
|
||||
typs[94] = types.NewChan(typs[2], types.Csend)
|
||||
typs[95] = newSig(params(typs[94], typs[3]), nil)
|
||||
typs[96] = types.NewArray(typs[0], 3)
|
||||
typs[97] = types.NewStruct(types.NoPkg, []*types.Field{types.NewField(src.NoXPos, Lookup("enabled"), typs[6]), types.NewField(src.NoXPos, Lookup("pad"), typs[96]), types.NewField(src.NoXPos, Lookup("needed"), typs[6]), types.NewField(src.NoXPos, Lookup("cgo"), typs[6]), types.NewField(src.NoXPos, Lookup("alignme"), typs[24])})
|
||||
typs[98] = newSig(params(typs[1], typs[3], typs[3]), nil)
|
||||
typs[99] = newSig(params(typs[1], typs[3]), nil)
|
||||
typs[100] = newSig(params(typs[1], typs[3], typs[15], typs[3], typs[15]), params(typs[15]))
|
||||
typs[101] = newSig(params(typs[94], typs[3]), params(typs[6]))
|
||||
typs[102] = newSig(params(typs[3], typs[91]), params(typs[6], typs[6]))
|
||||
typs[103] = newSig(params(typs[71]), nil)
|
||||
typs[104] = newSig(params(typs[1], typs[1], typs[71], typs[15], typs[15], typs[6]), params(typs[15], typs[6]))
|
||||
typs[105] = newSig(params(typs[1], typs[15], typs[15]), params(typs[7]))
|
||||
typs[106] = newSig(params(typs[1], typs[22], typs[22]), params(typs[7]))
|
||||
typs[107] = newSig(params(typs[1], typs[15], typs[15], typs[7]), params(typs[7]))
|
||||
typs[108] = types.NewSlice(typs[2])
|
||||
typs[109] = newSig(params(typs[1], typs[108], typs[15]), params(typs[108]))
|
||||
typs[110] = newSig(params(typs[3], typs[3], typs[5]), nil)
|
||||
typs[111] = newSig(params(typs[7], typs[5]), nil)
|
||||
typs[112] = newSig(params(typs[3], typs[3], typs[5]), params(typs[6]))
|
||||
typs[113] = newSig(params(typs[3], typs[3]), params(typs[6]))
|
||||
typs[114] = newSig(params(typs[7], typs[7]), params(typs[6]))
|
||||
typs[115] = newSig(params(typs[7], typs[5], typs[5]), params(typs[5]))
|
||||
typs[116] = newSig(params(typs[7], typs[5]), params(typs[5]))
|
||||
typs[117] = newSig(params(typs[22], typs[22]), params(typs[22]))
|
||||
typs[118] = newSig(params(typs[24], typs[24]), params(typs[24]))
|
||||
typs[119] = newSig(params(typs[20]), params(typs[22]))
|
||||
typs[120] = newSig(params(typs[20]), params(typs[24]))
|
||||
typs[121] = newSig(params(typs[20]), params(typs[60]))
|
||||
typs[122] = newSig(params(typs[22]), params(typs[20]))
|
||||
typs[123] = newSig(params(typs[24]), params(typs[20]))
|
||||
typs[124] = newSig(params(typs[60]), params(typs[20]))
|
||||
typs[125] = newSig(params(typs[26], typs[26]), params(typs[26]))
|
||||
typs[126] = newSig(nil, params(typs[5]))
|
||||
typs[127] = newSig(params(typs[5], typs[5]), nil)
|
||||
typs[128] = newSig(params(typs[5], typs[5], typs[5]), nil)
|
||||
typs[129] = newSig(params(typs[7], typs[1], typs[5]), nil)
|
||||
typs[130] = types.NewSlice(typs[7])
|
||||
typs[131] = newSig(params(typs[7], typs[130]), nil)
|
||||
typs[132] = newSig(params(typs[64], typs[64]), nil)
|
||||
typs[133] = newSig(params(typs[58], typs[58]), nil)
|
||||
typs[134] = newSig(params(typs[60], typs[60]), nil)
|
||||
typs[135] = newSig(params(typs[24], typs[24]), nil)
|
||||
return typs[:]
|
||||
}
|
||||
|
||||
@ -87,13 +87,16 @@ func convI2I(typ *byte, elem any) (ret any)
|
||||
|
||||
// Specialized type-to-interface conversion.
|
||||
// These return only a data pointer.
|
||||
func convT16(val any) unsafe.Pointer // val must be uint16-like (same size and alignment as a uint16)
|
||||
func convT32(val any) unsafe.Pointer // val must be uint32-like (same size and alignment as a uint32)
|
||||
func convT32F(val any) unsafe.Pointer // val must be float32-like
|
||||
func convT64(val any) unsafe.Pointer // val must be uint64-like (same size and alignment as a uint64 and contains no pointers)
|
||||
func convT64F(val any) unsafe.Pointer // val must be float64-like
|
||||
func convTstring(val any) unsafe.Pointer // val must be a string
|
||||
func convTslice(val any) unsafe.Pointer // val must be a slice
|
||||
// These functions take concrete types in the runtime. But they may
|
||||
// be used for a wider range of types, which have the same memory
|
||||
// layout as the parameter type. The compiler converts the
|
||||
// to-be-converted type to the parameter type before calling the
|
||||
// runtime function. This way, the call is ABI-insensitive.
|
||||
func convT16(val uint16) unsafe.Pointer
|
||||
func convT32(val uint32) unsafe.Pointer
|
||||
func convT64(val uint64) unsafe.Pointer
|
||||
func convTstring(val string) unsafe.Pointer
|
||||
func convTslice(val []uint8) unsafe.Pointer
|
||||
|
||||
// Type to empty-interface conversion.
|
||||
func convT2E(typ *byte, elem *any) (ret any)
|
||||
|
||||
@ -14,7 +14,6 @@ import (
|
||||
"cmd/compile/internal/ssagen"
|
||||
"cmd/compile/internal/typecheck"
|
||||
"cmd/compile/internal/types"
|
||||
"cmd/internal/objabi"
|
||||
"cmd/internal/sys"
|
||||
)
|
||||
|
||||
@ -136,7 +135,7 @@ func walkConvInterface(n *ir.ConvExpr, init *ir.Nodes) ir.Node {
|
||||
return e
|
||||
}
|
||||
|
||||
fnname, needsaddr := convFuncName(fromType, toType)
|
||||
fnname, argType, needsaddr := convFuncName(fromType, toType)
|
||||
|
||||
if !needsaddr && !fromType.IsInterface() {
|
||||
// Use a specialized conversion routine that only returns a data pointer.
|
||||
@ -144,10 +143,29 @@ func walkConvInterface(n *ir.ConvExpr, init *ir.Nodes) ir.Node {
|
||||
// e = iface{typ/tab, ptr}
|
||||
fn := typecheck.LookupRuntime(fnname)
|
||||
types.CalcSize(fromType)
|
||||
fn = typecheck.SubstArgTypes(fn, fromType)
|
||||
types.CalcSize(fn.Type())
|
||||
|
||||
arg := n.X
|
||||
switch {
|
||||
case fromType == argType:
|
||||
// already in the right type, nothing to do
|
||||
case fromType.Kind() == argType.Kind(),
|
||||
fromType.IsPtrShaped() && argType.IsPtrShaped():
|
||||
// can directly convert (e.g. named type to underlying type, or one pointer to another)
|
||||
arg = ir.NewConvExpr(n.Pos(), ir.OCONVNOP, argType, arg)
|
||||
case fromType.IsInteger() && argType.IsInteger():
|
||||
// can directly convert (e.g. int32 to uint32)
|
||||
arg = ir.NewConvExpr(n.Pos(), ir.OCONV, argType, arg)
|
||||
default:
|
||||
// unsafe cast through memory
|
||||
arg = copyExpr(arg, arg.Type(), init)
|
||||
var addr ir.Node = typecheck.NodAddr(arg)
|
||||
addr = ir.NewConvExpr(n.Pos(), ir.OCONVNOP, argType.PtrTo(), addr)
|
||||
arg = ir.NewStarExpr(n.Pos(), addr)
|
||||
arg.SetType(argType)
|
||||
}
|
||||
|
||||
call := ir.NewCallExpr(base.Pos, ir.OCALL, fn, nil)
|
||||
call.Args = []ir.Node{n.X}
|
||||
call.Args = []ir.Node{arg}
|
||||
e := ir.NewBinaryExpr(base.Pos, ir.OEFACE, typeword(), safeExpr(walkExpr(typecheck.Expr(call), init), init))
|
||||
e.SetType(toType)
|
||||
e.SetTypecheck(1)
|
||||
@ -295,77 +313,45 @@ func walkStringToRunes(n *ir.ConvExpr, init *ir.Nodes) ir.Node {
|
||||
}
|
||||
|
||||
// convFuncName builds the runtime function name for interface conversion.
|
||||
// It also reports whether the function expects the data by address.
|
||||
// It also returns the argument type that the runtime function takes, and
|
||||
// whether the function expects the data by address.
|
||||
// Not all names are possible. For example, we never generate convE2E or convE2I.
|
||||
func convFuncName(from, to *types.Type) (fnname string, needsaddr bool) {
|
||||
// With register-based ABI, float32 and uint32 are passed in different
|
||||
// registers, so we cannot use convT32 for float32.
|
||||
// isFloatLike returns whether t is a float-like type (float32, float64,
|
||||
// single-element array/struct with a float-like element), for which
|
||||
// the argument is passed in a floating point register under register-
|
||||
// based ABI.
|
||||
var isFloatLike func(t *types.Type) bool
|
||||
isFloatLike = func(t *types.Type) bool {
|
||||
switch t.Kind() {
|
||||
case types.TFLOAT32, types.TFLOAT64:
|
||||
return true
|
||||
case types.TARRAY:
|
||||
return t.NumElem() == 1 && isFloatLike(t.Elem())
|
||||
case types.TSTRUCT:
|
||||
fsl := t.FieldSlice()
|
||||
for idx, f := range fsl {
|
||||
if f.Type.Width == 0 {
|
||||
continue
|
||||
}
|
||||
if isFloatLike(f.Type) && idx == len(fsl)-1 {
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
return false
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func convFuncName(from, to *types.Type) (fnname string, argType *types.Type, needsaddr bool) {
|
||||
tkind := to.Tie()
|
||||
switch from.Tie() {
|
||||
case 'I':
|
||||
if tkind == 'I' {
|
||||
return "convI2I", false
|
||||
return "convI2I", types.Types[types.TINTER], false
|
||||
}
|
||||
case 'T':
|
||||
switch {
|
||||
case from.Size() == 2 && from.Align == 2:
|
||||
return "convT16", false
|
||||
case from.Size() == 4 && isFloatLike(from):
|
||||
return "convT32F", false
|
||||
case from.Size() == 4 && from.Align == 4 && !from.HasPointers() && (!objabi.Experiment.RegabiArgs || from.NumComponents(types.CountBlankFields) == 1):
|
||||
return "convT32", false
|
||||
case from.Size() == 8 && isFloatLike(from):
|
||||
return "convT64F", false
|
||||
case from.Size() == 8 && from.Align == types.Types[types.TUINT64].Align && !from.HasPointers() && (!objabi.Experiment.RegabiArgs || from.NumComponents(types.CountBlankFields) == 1):
|
||||
return "convT64", false
|
||||
return "convT16", types.Types[types.TUINT16], false
|
||||
case from.Size() == 4 && from.Align == 4 && !from.HasPointers():
|
||||
return "convT32", types.Types[types.TUINT32], false
|
||||
case from.Size() == 8 && from.Align == types.Types[types.TUINT64].Align && !from.HasPointers():
|
||||
return "convT64", types.Types[types.TUINT64], false
|
||||
}
|
||||
if sc := from.SoleComponent(); sc != nil {
|
||||
switch {
|
||||
case sc.IsString():
|
||||
return "convTstring", false
|
||||
return "convTstring", types.Types[types.TSTRING], false
|
||||
case sc.IsSlice():
|
||||
return "convTslice", false
|
||||
return "convTslice", types.NewSlice(types.Types[types.TUINT8]), false // the element type doesn't matter
|
||||
}
|
||||
}
|
||||
|
||||
switch tkind {
|
||||
case 'E':
|
||||
if !from.HasPointers() {
|
||||
return "convT2Enoptr", true
|
||||
return "convT2Enoptr", types.Types[types.TUNSAFEPTR], true
|
||||
}
|
||||
return "convT2E", true
|
||||
return "convT2E", types.Types[types.TUNSAFEPTR], true
|
||||
case 'I':
|
||||
if !from.HasPointers() {
|
||||
return "convT2Inoptr", true
|
||||
return "convT2Inoptr", types.Types[types.TUNSAFEPTR], true
|
||||
}
|
||||
return "convT2I", true
|
||||
return "convT2I", types.Types[types.TUNSAFEPTR], true
|
||||
}
|
||||
}
|
||||
base.Fatalf("unknown conv func %c2%c", from.Tie(), to.Tie())
|
||||
|
||||
@ -1147,7 +1147,7 @@ func (o *orderState) expr1(n, lhs ir.Node) ir.Node {
|
||||
if n.X.Type().IsInterface() {
|
||||
return n
|
||||
}
|
||||
if _, needsaddr := convFuncName(n.X.Type(), n.Type()); needsaddr || isStaticCompositeLiteral(n.X) {
|
||||
if _, _, needsaddr := convFuncName(n.X.Type(), n.Type()); needsaddr || isStaticCompositeLiteral(n.X) {
|
||||
// Need a temp if we need to pass the address to the conversion function.
|
||||
// We also process static composite literal node here, making a named static global
|
||||
// whose address we can put directly in an interface (see OCONVIFACE case in walk).
|
||||
|
||||
@ -357,10 +357,6 @@ func convT32(val uint32) (x unsafe.Pointer) {
|
||||
return
|
||||
}
|
||||
|
||||
func convT32F(val float32) (x unsafe.Pointer) {
|
||||
return convT32(*(*uint32)(unsafe.Pointer(&val)))
|
||||
}
|
||||
|
||||
func convT64(val uint64) (x unsafe.Pointer) {
|
||||
if val < uint64(len(staticuint64s)) {
|
||||
x = unsafe.Pointer(&staticuint64s[val])
|
||||
@ -371,10 +367,6 @@ func convT64(val uint64) (x unsafe.Pointer) {
|
||||
return
|
||||
}
|
||||
|
||||
func convT64F(val float64) (x unsafe.Pointer) {
|
||||
return convT64(*(*uint64)(unsafe.Pointer(&val)))
|
||||
}
|
||||
|
||||
func convTstring(val string) (x unsafe.Pointer) {
|
||||
if val == "" {
|
||||
x = unsafe.Pointer(&zeroVal[0])
|
||||
|
||||
Loading…
Reference in New Issue
Block a user