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cmd/compile: fix OffPtr type in 2-field struct Store rule

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The type of the OffPtr for the first field was incorrect. It should
have been a pointer to the field type, rather than the field
type itself.

Fixes #19475.

Change-Id: I3960b404da0f4bee759331126cce6140d2ce1df7
Reviewed-on: https://go-review.googlesource.com/37869
Run-TryBot: Michael Munday <munday@ca.ibm.com>
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Michael Munday 2017-03-09 13:03:07 -05:00
parent 4210930a28
commit 945180fe2a
2 changed files with 3 additions and 3 deletions
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2
src/cmd/compile/internal/ssa/gen/generic.rules
View File

@ -800,7 +800,7 @@
(OffPtr <t.FieldType(1).PtrTo()> [t.FieldOff(1)] dst)
f1
(Store [t.FieldType(0).Size()]
(OffPtr <t.FieldType(0)> [0] dst)
(OffPtr <t.FieldType(0).PtrTo()> [0] dst)
f0 mem))
(Store dst (StructMake3 <t> f0 f1 f2) mem) ->
(Store [t.FieldType(2).Size()]

4
src/cmd/compile/internal/ssa/rewritegeneric.go
View File

@ -14705,7 +14705,7 @@ func rewriteValuegeneric_OpStore(v *Value, config *Config) bool {
}
// match: (Store dst (StructMake2 <t> f0 f1) mem)
// cond:
// result: (Store [t.FieldType(1).Size()] (OffPtr <t.FieldType(1).PtrTo()> [t.FieldOff(1)] dst) f1 (Store [t.FieldType(0).Size()] (OffPtr <t.FieldType(0)> [0] dst) f0 mem))
// result: (Store [t.FieldType(1).Size()] (OffPtr <t.FieldType(1).PtrTo()> [t.FieldOff(1)] dst) f1 (Store [t.FieldType(0).Size()] (OffPtr <t.FieldType(0).PtrTo()> [0] dst) f0 mem))
for {
dst := v.Args[0]
v_1 := v.Args[1]
@ -14725,7 +14725,7 @@ func rewriteValuegeneric_OpStore(v *Value, config *Config) bool {
v.AddArg(f1)
v1 := b.NewValue0(v.Pos, OpStore, TypeMem)
v1.AuxInt = t.FieldType(0).Size()
v2 := b.NewValue0(v.Pos, OpOffPtr, t.FieldType(0))
v2 := b.NewValue0(v.Pos, OpOffPtr, t.FieldType(0).PtrTo())
v2.AuxInt = 0
v2.AddArg(dst)
v1.AddArg(v2)