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Joel Sing 70c7fb75e9 cmd/compile: correct code generation for right shifts on riscv64 
The code generation on riscv64 will currently result in incorrect
assembly when a 32 bit integer is right shifted by an amount that
exceeds the size of the type. In particular, this occurs when an
int32 or uint32 is cast to a 64 bit type and right shifted by a
value larger than 31.

Fix this by moving the SRAW/SRLW conversion into the right shift
rules and removing the SignExt32to64/ZeroExt32to64. Add additional
rules that rewrite to SRAIW/SRLIW when the shift is less than the
size of the type, or replace/eliminate the shift when it exceeds
the size of the type.

Add SSA tests that would have caught this issue. Also add additional
codegen tests to ensure that the resulting assembly is what we
expect in these overflow cases.

Fixes #64285

Change-Id: Ie97b05668597cfcb91413afefaab18ee1aa145ec
Reviewed-on: https://go-review.googlesource.com/c/go/+/545035
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: M Zhuo <mzh@golangcn.org>
Reviewed-by: Mark Ryan <markdryan@rivosinc.com>
Run-TryBot: Joel Sing <joel@sing.id.au>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-12-01 19:30:59 +00:00
..
abi test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
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: correct code generation for right shifts on riscv64 2023-12-01 19:30:59 +00:00
ddd2.dir
dwarf
fixedbugs cmd/compile: interleave devirtualization and inlining 2023-11-20 18:09:45 +00:00
import2.dir
import4.dir
interface go/types, types2: more systematic use of Checker.use und useLHS 2023-03-28 14:28:33 +00:00
intrinsic.dir
ken
linkname.dir
method4.dir
retjmp.dir
runtime
stress
syntax
typeparam test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +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 test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
char_lit1.go
char_lit.go
checkbce.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
clear.go cmd/compile: add clear(x) builtin 2023-01-31 19:43:07 +00:00
clearfat.go
closedchan.go
closure1.go
closure2.go cmd/compile: experimental loop iterator capture semantics change 2023-03-06 18:34:24 +00:00
closure3.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
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 all: add wasip1 support 2023-04-11 20:56:32 +00:00
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 cmd/compile/internal/inl: inline based on scoring when GOEXPERIMENT=newinliner 2023-09-14 19:43:26 +00:00
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 cmd/compile: experimental loop iterator capture semantics change 2023-03-06 18:34:24 +00:00
fibo.go
finprofiled.go test: ignore MemProfileRecords with no live objects in finprofiled.go 2023-11-16 05:48:00 +00:00
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 test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
gc1.go
gc2.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
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 test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
inline_sync.go sync: use atomic.Uint32 in Once 2023-10-06 21:01:50 +00:00
inline_variadic.go
inline.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
int_lit.go
intcvt.go
intrinsic_atomic.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
intrinsic.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
iota.go
label1.go
label.go
linkmain_run.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
linkmain.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
linkname3.go
linkname.go
linkobj.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
linkx_run.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
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 test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
live_uintptrkeepalive.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
live.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
loopbce.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
mainsig.go
makechan.go
makemap.go
makenew.go
makeslice.go
mallocfin.go
map1.go
map.go
mapclear.go
maplinear.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
maymorestack.go
mergemul.go
method1.go
method2.go
method3.go
method4.go
method5.go
method6.go
method7.go
method.go
named1.go
named.go
newinline.go cmd/compile/internal/inline: refactor AnalyzeFunc 2023-11-16 20:15:25 +00:00
nil.go
nilcheck.go
nilptr2.go
nilptr3.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
nilptr4.go
nilptr5_aix.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
nilptr5_wasm.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
nilptr5.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
nilptr_aix.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
nilptr.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
noinit.go cmd/compile: reenable inline static init 2023-04-14 17:57:36 +00:00
nosplit.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
nowritebarrier.go cmd/compile: redo IsRuntimePkg/IsReflectPkg predicate 2023-08-22 19:18:21 +00:00
nul1.go
opt_branchlikely.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
parentype.go
peano.go
phiopt.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
print.go
print.out
printbig.go
printbig.out
prove_constant_folding.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
prove_invert_loop_with_unused_iterators.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
prove.go test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
range2.go all: rename GOEXPERIMENT=range to rangefunc 2023-11-08 15:32:14 +00:00
range3.go cmd/compile: fix typecheck range over rune literal 2023-12-01 17:20:08 +00:00
range4.go all: rename GOEXPERIMENT=range to rangefunc 2023-11-08 15:32:14 +00:00
range.go
rangegen.go all: rename GOEXPERIMENT=range to rangefunc 2023-11-08 15:32:14 +00:00
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 test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
recover5.go
recover.go
reflectmethod1.go
reflectmethod2.go
reflectmethod3.go
reflectmethod4.go
reflectmethod5.go
reflectmethod6.go
reflectmethod7.go
reflectmethod8.go
rename1.go cmd/compile/internal/types2: only mark variables as used if they are 2023-04-19 14:07:00 +00:00
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 test: migrate remaining files to go:build syntax 2023-10-19 23:33:25 +00:00
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 cmd/link: put zero-sized data symbols at same address as runtime.zerobase 2023-04-28 18:35:43 +00:00

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.