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Matthew Dempsky 2e457b3868 cmd/compile/internal/noder: handle unsafe.Sizeof, etc in unified IR 
Previously, the unified frontend implemented unsafe.Sizeof, etc that
involved derived types by constructing a normal OSIZEOF, etc
expression, including fully instantiating their argument. (When
unsafe.Sizeof is applied to a non-generic type, types2 handles
constant folding it.)

This worked, but involves unnecessary work, since all we really need
to track is the argument type (and the field selections, for
unsafe.Offsetof).

Further, the argument expression could generate temporary variables,
which would then go unused after typecheck replaced the OSIZEOF
expression with an OLITERAL. This results in compiler failures after
CL 523315, which made later passes stricter about expecting the
frontend to not construct unused temporaries.

Fixes #62515.

Change-Id: I37baed048fd2e35648c59243f66c97c24413aa94
Reviewed-on: https://go-review.googlesource.com/c/go/+/527097
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Auto-Submit: Matthew Dempsky <mdempsky@google.com>
2023-09-11 20:48:07 +00:00
..
abi
alias3.dir
arenas reflect: fix ArenaNew to match documentation 2023-06-16 17:08:43 +00:00
asmhdr.dir
chan
closure3.dir cmd/compile/internal/noder: remove inlined closure naming hack 2023-08-17 19:36:29 +00:00
closure5.dir
codegen cmd/compile/internal/ssa: improve masking codegen on PPC64 2023-09-06 16:34:20 +00:00
ddd2.dir
dwarf
fixedbugs cmd/compile/internal/noder: handle unsafe.Sizeof, etc in unified IR 2023-09-11 20:48:07 +00:00
import2.dir
import4.dir
interface
intrinsic.dir
ken
linkname.dir
method4.dir
retjmp.dir
runtime
stress
syntax
typeparam go/types, types2: don't infer type argument for unused parameter in interfaces 2023-05-25 21:37:01 +00:00
uintptrescapes.dir
64bit.go
235.go
alg.go
alias1.go
alias2.go
alias3.go
alias.go
align.go
append1.go
append.go
args.go
armimm.go
asmhdr.go
assign1.go
assign.go
atomicload.go
bigalg.go
bigmap.go
blank1.go
blank.go
bom.go
bombad.go
bounds.go
cannotassign.go
chancap.go
chanlinear.go
char_lit1.go
char_lit.go
checkbce.go Revert "cmd/compile: sparse conditional constant propagation" 2023-05-24 14:39:34 +00:00
clear.go
clearfat.go
closedchan.go
closure1.go
closure2.go
closure3.go
closure4.go
closure5.go
closure6.go
closure7.go
closure.go
cmp6.go
cmp.go
cmplx.go
cmplxdivide1.go
cmplxdivide.c
cmplxdivide.go
complit1.go
complit.go
compos.go
const1.go
const2.go
const3.go
const4.go
const5.go
const6.go
const7.go
const8.go
const.go
convert1.go
convert2.go
convert3.go
convert4.go
convert.go
convinline.go
convlit1.go
convlit.go
convT2X.go
copy1.go
copy.go
crlf.go
ddd1.go
ddd2.go
ddd.go
decl.go
declbad.go
defer.go
defererrcheck.go
deferfin.go
defernil.go
deferprint.go
deferprint.out
devirt.go
directive2.go
directive.go
divide.go
divmod.go
embedfunc.go
embedvers.go
empty.go
env.go test,internal/testdir: don't set GOOS/GOARCH 2023-05-12 12:34:59 +00:00
eof1.go
eof.go
escape2.go cmd/compile: enable -d=zerocopy by default 2023-08-18 11:59:42 +00:00
escape2n.go cmd/compile: enable -d=zerocopy by default 2023-08-18 11:59:42 +00:00
escape3.go
escape4.go
escape5.go cmd/compile/internal/noder: stop preserving original const strings 2023-09-08 18:50:24 +00:00
escape_array.go
escape_calls.go
escape_closure.go cmd/compile/internal/escape: optimize indirect closure calls 2023-08-17 16:36:09 +00:00
escape_field.go
escape_goto.go
escape_hash_maphash.go
escape_iface.go test: remove *_unified.go variants 2023-05-23 17:16:35 +00:00
escape_indir.go
escape_level.go
escape_map.go
escape_mutations.go cmd/compile: restore zero-copy string->[]byte optimization 2023-08-18 11:58:37 +00:00
escape_param.go
escape_reflect.go cmd/compile/internal/noder: stop preserving original const strings 2023-09-08 18:50:24 +00:00
escape_runtime_atomic.go
escape_selfassign.go
escape_slice.go cmd/compile/internal/noder: stop preserving original const strings 2023-09-08 18:50:24 +00:00
escape_struct_param1.go
escape_struct_param2.go
escape_struct_return.go
escape_sync_atomic.go
escape_unsafe.go
escape.go
fibo.go
finprofiled.go
float_lit2.go
float_lit3.go
float_lit.go
floatcmp.go
for.go test: add test cases for index value with range array clear 2023-07-10 16:36:41 +00:00
func1.go
func2.go
func3.go
func4.go
func5.go
func6.go
func7.go
func8.go
func.go
funcdup2.go
funcdup.go
fuse.go
gc1.go
gc2.go
gc.go
gcgort.go
gcstring.go
goprint.go
goprint.out
goto.go
heapsampling.go
helloworld.go
helloworld.out
if.go
import1.go
import2.go
import4.go
import5.go
import6.go
import.go
index0.go
index1.go
index2.go
index.go
indirect1.go
indirect.go
init1.go
init.go
initcomma.go
initexp.go
initialize.go
initializerr.go
initloop.go
inline_big.go cmd/compile: restore zero-copy string->[]byte optimization 2023-08-18 11:58:37 +00:00
inline_caller.go
inline_callers.go
inline_endian.go
inline_literal.go
inline_math_bits_rotate.go
inline_sync.go reflect: do not escape Value.Type 2023-05-12 21:11:51 +00:00
inline_variadic.go
inline.go cmd/compile/internal/noder: elide statically known "if" statements 2023-08-23 18:01:55 +00:00
int_lit.go
intcvt.go
intrinsic_atomic.go
intrinsic.go
iota.go
label1.go
label.go
linkmain_run.go
linkmain.go
linkname3.go
linkname.go
linkobj.go
linkx_run.go
linkx.go
literal2.go
literal.go
live1.go
live2.go cmd/compile/internal/reflectdata: share hmap and hiter types 2023-08-21 23:29:33 +00:00
live_regabi.go cmd/compile/internal/walk: reuse runtime.scase 2023-08-21 23:34:34 +00:00
live_uintptrkeepalive.go
live.go cmd/compile/internal/walk: reuse runtime.scase 2023-08-21 23:34:34 +00:00
loopbce.go Revert "cmd/compile: sparse conditional constant propagation" 2023-05-24 14:39:34 +00:00
mainsig.go
makechan.go
makemap.go
makenew.go
makeslice.go
mallocfin.go
map1.go
map.go
mapclear.go
maplinear.go
maymorestack.go
mergemul.go
method1.go
method2.go
method3.go
method4.go
method5.go
method6.go
method7.go
method.go
named1.go
named.go
nil.go
nilcheck.go
nilptr2.go
nilptr3.go
nilptr4.go
nilptr5_aix.go
nilptr5_wasm.go
nilptr5.go
nilptr_aix.go
nilptr.go
noinit.go
nosplit.go
nowritebarrier.go cmd/compile: redo IsRuntimePkg/IsReflectPkg predicate 2023-08-22 19:18:21 +00:00
nul1.go
opt_branchlikely.go
parentype.go
peano.go
phiopt.go
print.go
print.out
printbig.go
printbig.out
prove_constant_folding.go
prove_invert_loop_with_unused_iterators.go cmd/compile: try to rewrite loops to count down 2023-07-31 18:33:29 +00:00
prove.go
range.go
README.md internal/testdir: move to cmd/internal/testdir 2023-05-12 17:18:08 +00:00
recover1.go
recover2.go
recover3.go
recover4.go
recover5.go
recover.go
reflectmethod1.go
reflectmethod2.go
reflectmethod3.go
reflectmethod4.go
reflectmethod5.go
reflectmethod6.go
reflectmethod7.go
reflectmethod8.go
rename1.go
rename.go
reorder2.go
reorder.go
retjmp.go
return.go
rotate0.go
rotate1.go
rotate2.go
rotate3.go
rotate.go
rune.go
runtime.go
shift1.go
shift2.go
shift3.go
sieve.go
sigchld.go
sigchld.out
simassign.go
sizeof.go
slice3.go
slice3err.go
slicecap.go
sliceopt.go
solitaire.go
stack.go
stackobj2.go
stackobj3.go
stackobj.go
strcopy.go
strength.go
string_lit.go
stringrange.go
struct0.go
switch2.go
switch3.go
switch4.go
switch5.go
switch6.go
switch7.go
switch.go
tighten.go cmd/compile: enhance tighten pass for memory values 2023-05-16 01:01:38 +00:00
tinyfin.go
torture.go
turing.go
typecheck.go
typecheckloop.go
typeswitch1.go
typeswitch2.go
typeswitch2b.go
typeswitch3.go
typeswitch.go
uintptrescapes2.go
uintptrescapes3.go
uintptrescapes.go
uintptrkeepalive.go
undef.go
unsafe_slice_data.go
unsafe_string_data.go
unsafe_string.go
unsafebuiltins.go
used.go
utf.go
varerr.go
varinit.go
winbatch.go
writebarrier.go
zerodivide.go
zerosize.go

README.md

The test directory contains tests of the Go tool chain and runtime. It includes black box tests, regression tests, and error output tests. They are run as part of all.bash.

To run just these tests, execute:

../bin/go test cmd/internal/testdir

To run just tests from specified files in this directory, execute:

../bin/go test cmd/internal/testdir -run='Test/(file1.go|file2.go|...)'

Standard library tests should be written as regular Go tests in the appropriate package.

The tool chain and runtime also have regular Go tests in their packages. The main reasons to add a new test to this directory are:

  • it is most naturally expressed using the test runner; or
  • it is also applicable to gccgo and other Go tool chains.