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cmd/vet: teach asm checker about PEXTRD’s op size

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Fixes #15271

Change-Id: I28e3fb5bde1e6fd5b263b1434873b8ce051aee97
Reviewed-on: https://go-review.googlesource.com/22083
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
This commit is contained in:
Josh Bleecher Snyder 2016-04-14 09:39:40 -07:00
parent 045411e6f2
commit 67cdec00c2
3 changed files with 18 additions and 0 deletions
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5
src/cmd/vet/asmdecl.go
View File

@ -559,6 +559,11 @@ func asmCheckVar(badf func(string, ...interface{}), fn *asmFunc, line, expr stri
src = 8
break
}
if strings.HasPrefix(op, "P") && strings.HasSuffix(op, "RD") {
// PINSRD, PEXTRD, etc
src = 4
break
}
if strings.HasPrefix(op, "F") && (strings.HasSuffix(op, "F") || strings.HasSuffix(op, "FP")) {
// FMOVFP, FXCHF, etc
src = 4

2
src/cmd/vet/testdata/asm.go vendored
View File

@ -31,3 +31,5 @@ func nosplit(x int)
func rodata(x int)
func noptr(x int)
func wrapper(x int)
func f15271() (x uint32)

11
src/cmd/vet/testdata/asm1.s vendored
View File

@ -252,3 +252,14 @@ TEXT ·returnnamed(SB),0,$0-41
TEXT ·returnintmissing(SB),0,$0-8
RET // ERROR "RET without writing to 8-byte ret\+0\(FP\)"
// issue 15271
TEXT ·f15271(SB), NOSPLIT, $0-4
// Stick 123 into the low 32 bits of X0.
MOVQ $123, AX
PINSRD $0, AX, X0
// Return them.
PEXTRD $0, X0, x+0(FP)
RET