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cmd/compile: don't use R25 as input for LoweredMove on ARM64

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The rule uses R25 as a scratch register. If the input is R25 it
will be clobbered on the way, causing wrong result.

Change-Id: I464eadbdef0f3a5e90f9ef8c818393baa4335b87
Reviewed-on: https://go-review.googlesource.com/c/go/+/430015
Run-TryBot: Cherry Mui <cherryyz@google.com>
Reviewed-by: Jenny Rakoczy <jenny@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Eric Fang <eric.fang@arm.com>
This commit is contained in:
Cherry Mui 2022-09-09 18:43:08 -04:00
parent f78efc0178
commit a813be86df
2 changed files with 2 additions and 2 deletions
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2
src/cmd/compile/internal/ssa/gen/ARM64Ops.go
View File

@ -593,7 +593,7 @@ func init() {
name: "LoweredMove",
argLength: 4,
reg: regInfo{
inputs: []regMask{buildReg("R17"), buildReg("R16"), gp},
inputs: []regMask{buildReg("R17"), buildReg("R16"), gp &^ buildReg("R25")},
clobbers: buildReg("R16 R17 R25"),
},
clobberFlags: true,

2
src/cmd/compile/internal/ssa/opGen.go
View File

@ -22309,7 +22309,7 @@ var opcodeTable = [...]opInfo{
inputs: []inputInfo{
{0, 131072}, // R17
{1, 65536}, // R16
{2, 670826495}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R19 R20 R21 R22 R23 R24 R25 R26 R30
{2, 637272063}, // R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R19 R20 R21 R22 R23 R24 R26 R30
},
clobbers: 33751040, // R16 R17 R25
},