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go/analyis/passes/asmdecl: allow loading both parts of a complex with one instruction

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Update golang/go#35264

Change-Id: I4317c75cc5acc592ab739b0aab4cd85280858219
Reviewed-on: https://go-review.googlesource.com/c/tools/+/204537
Reviewed-by: Alan Donovan <adonovan@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Keith Randall 2019-10-31 09:50:10 -07:00 committed by Keith Randall
parent fda23558a1
commit 6b7b8b79ae
2 changed files with 16 additions and 1 deletions
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9
go/analysis/passes/asmdecl/asmdecl.go
View File

@ -661,6 +661,10 @@ func asmCheckVar(badf func(string, ...interface{}), fn *asmFunc, line, expr stri
src = 4
break
}
if op == "MOVO" || op == "MOVOU" {
src = 16
break
}
if strings.HasPrefix(op, "SET") {
// SETEQ, etc
src = 1
@ -736,6 +740,11 @@ func asmCheckVar(badf func(string, ...interface{}), fn *asmFunc, line, expr stri
vk = v.inner[0].kind
vs = v.inner[0].size
vt = v.inner[0].typ
case asmComplex:
// Allow a single instruction to load both parts of a complex.
if int(kind) == vs {
kind = asmComplex
}
}
if addr {
vk = asmKind(archDef.ptrSize)

8
go/analysis/passes/asmdecl/testdata/src/a/asm1.s vendored
View File

@ -228,7 +228,6 @@ TEXT ·argiface(SB),0,$0-32
TEXT ·argcomplex(SB),0,$24 // want `wrong argument size 0; expected \$\.\.\.-24`
MOVSS x+0(FP), X0 // want `invalid MOVSS of x\+0\(FP\); complex64 is 8-byte value containing x_real\+0\(FP\) and x_imag\+4\(FP\)`
MOVSD x+0(FP), X0 // want `invalid MOVSD of x\+0\(FP\); complex64 is 8-byte value containing x_real\+0\(FP\) and x_imag\+4\(FP\)`
MOVSS x_real+0(FP), X0
MOVSD x_real+0(FP), X0 // want `invalid MOVSD of x_real\+0\(FP\); real\(complex64\) is 4-byte value`
MOVSS x_real+4(FP), X0 // want `invalid offset x_real\+4\(FP\); expected x_real\+0\(FP\)`
@ -242,6 +241,13 @@ TEXT ·argcomplex(SB),0,$24 // want `wrong argument size 0; expected \$\.\.\.-24
MOVSS y_imag+16(FP), X0 // want `invalid MOVSS of y_imag\+16\(FP\); imag\(complex128\) is 8-byte value`
MOVSD y_imag+16(FP), X0
MOVSS y_imag+24(FP), X0 // want `invalid offset y_imag\+24\(FP\); expected y_imag\+16\(FP\)`
// Loading both parts of a complex is ok: see issue 35264.
MOVSD x+0(FP), X0
MOVO y+8(FP), X0
MOVOU y+8(FP), X0
// These are not ok.
MOVO x+0(FP), X0 // want `invalid MOVO of x\+0\(FP\); complex64 is 8-byte value containing x_real\+0\(FP\) and x_imag\+4\(FP\)`
MOVOU x+0(FP), X0 // want `invalid MOVOU of x\+0\(FP\); complex64 is 8-byte value containing x_real\+0\(FP\) and x_imag\+4\(FP\)`
RET
TEXT ·argstruct(SB),0,$64 // want `wrong argument size 0; expected \$\.\.\.-24`