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cmd/compile: fix If lowering on loong64

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Update #40724

Co-authored-by: Xiaolin Zhao <zhaoxiaolin@loongson.cn>
Change-Id: I44477e32db765e0299d8361bd2b8d2c95564ed28
Reviewed-on: https://go-review.googlesource.com/c/go/+/521788
Reviewed-by: Meidan Li <limeidan@loongson.cn>
Reviewed-by: David Chase <drchase@google.com>
Auto-Submit: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: David Chase <drchase@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
This commit is contained in:
Guoqi Chen 2023-08-16 10:22:13 +08:00 committed by Gopher Robot
parent e58c9baa9f
commit b3b442449b
2 changed files with 27 additions and 3 deletions
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3
src/cmd/compile/internal/ssa/_gen/LOONG64.rules
View File

@ -416,7 +416,7 @@
(GetCallerSP ...) => (LoweredGetCallerSP ...)
(GetCallerPC ...) => (LoweredGetCallerPC ...)
(If cond yes no) => (NE cond yes no)
(If cond yes no) => (NE (MOVBUreg <typ.UInt64> cond) yes no)
// Write barrier.
(WB ...) => (LoweredWB ...)
@ -450,6 +450,7 @@
(EQ (SGTconst [0] x) yes no) => (GEZ x yes no)
(NE (SGT x (MOVVconst [0])) yes no) => (GTZ x yes no)
(EQ (SGT x (MOVVconst [0])) yes no) => (LEZ x yes no)
(MOVBUreg x:((SGT|SGTU) _ _)) => x
// fold offset into address
(ADDVconst [off1] (MOVVaddr [off2] {sym} ptr)) && is32Bit(off1+int64(off2)) => (MOVVaddr [int32(off1)+int32(off2)] {sym} ptr)

27
src/cmd/compile/internal/ssa/rewriteLOONG64.go
View File

@ -1773,6 +1773,26 @@ func rewriteValueLOONG64_OpLOONG64MOVBUload(v *Value) bool {
}
func rewriteValueLOONG64_OpLOONG64MOVBUreg(v *Value) bool {
v_0 := v.Args[0]
// match: (MOVBUreg x:(SGT _ _))
// result: x
for {
x := v_0
if x.Op != OpLOONG64SGT {
break
}
v.copyOf(x)
return true
}
// match: (MOVBUreg x:(SGTU _ _))
// result: x
for {
x := v_0
if x.Op != OpLOONG64SGTU {
break
}
v.copyOf(x)
return true
}
// match: (MOVBUreg x:(MOVBUload _ _))
// result: (MOVVreg x)
for {
@ -7608,6 +7628,7 @@ func rewriteValueLOONG64_OpZero(v *Value) bool {
return false
}
func rewriteBlockLOONG64(b *Block) bool {
typ := &b.Func.Config.Types
switch b.Kind {
case BlockLOONG64EQ:
// match: (EQ (FPFlagTrue cmp) yes no)
@ -7807,10 +7828,12 @@ func rewriteBlockLOONG64(b *Block) bool {
}
case BlockIf:
// match: (If cond yes no)
// result: (NE cond yes no)
// result: (NE (MOVBUreg <typ.UInt64> cond) yes no)
for {
cond := b.Controls[0]
b.resetWithControl(BlockLOONG64NE, cond)
v0 := b.NewValue0(cond.Pos, OpLOONG64MOVBUreg, typ.UInt64)
v0.AddArg(cond)
b.resetWithControl(BlockLOONG64NE, v0)
return true
}
case BlockLOONG64LEZ: