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https://github.com/golang/go
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cmd/compile: use correct type in riscv64 late lower pass
The right-hand side SLLI always contains valid content in the high 32 bits, so we should use the 64 bit integer type. Using wrong type may lead to wrong optimizations in cse pass. Should fix x/text test failures. Change-Id: I972dd913b8fb238d180bb12f8b1801adc8503fc0 Reviewed-on: https://go-review.googlesource.com/c/go/+/443875 Reviewed-by: Dmitri Goutnik <dgoutnik@gmail.com> Reviewed-by: Cherry Mui <cherryyz@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Wayne Zuo <wdvxdr@golangcn.org> Reviewed-by: David Chase <drchase@google.com>
This commit is contained in:
Wayne Zuo
Meng Zhuo
parent
85196fc982
commit
2952fe4f16
@ -3,15 +3,15 @@
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// license that can be found in the LICENSE file.
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// Fold constant shift with extension.
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(SRAI <t> [c] (MOVBreg x)) && c < 8 => (SRAI [56+c] (SLLI <t> [56] x))
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(SRAI <t> [c] (MOVHreg x)) && c < 16 => (SRAI [48+c] (SLLI <t> [48] x))
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(SRAI <t> [c] (MOVWreg x)) && c < 32 => (SRAI [32+c] (SLLI <t> [32] x))
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(SRLI <t> [c] (MOVBUreg x)) && c < 8 => (SRLI [56+c] (SLLI <t> [56] x))
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(SRLI <t> [c] (MOVHUreg x)) && c < 16 => (SRLI [48+c] (SLLI <t> [48] x))
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(SRLI <t> [c] (MOVWUreg x)) && c < 32 => (SRLI [32+c] (SLLI <t> [32] x))
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(SLLI <t> [c] (MOVBUreg x)) && c <= 56 => (SRLI [56-c] (SLLI <t> [56] x))
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(SLLI <t> [c] (MOVHUreg x)) && c <= 48 => (SRLI [48-c] (SLLI <t> [48] x))
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(SLLI <t> [c] (MOVWUreg x)) && c <= 32 => (SRLI [32-c] (SLLI <t> [32] x))
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(SRAI [c] (MOVBreg x)) && c < 8 => (SRAI [56+c] (SLLI <typ.Int64> [56] x))
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(SRAI [c] (MOVHreg x)) && c < 16 => (SRAI [48+c] (SLLI <typ.Int64> [48] x))
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(SRAI [c] (MOVWreg x)) && c < 32 => (SRAI [32+c] (SLLI <typ.Int64> [32] x))
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(SRLI [c] (MOVBUreg x)) && c < 8 => (SRLI [56+c] (SLLI <typ.UInt64> [56] x))
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(SRLI [c] (MOVHUreg x)) && c < 16 => (SRLI [48+c] (SLLI <typ.UInt64> [48] x))
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(SRLI [c] (MOVWUreg x)) && c < 32 => (SRLI [32+c] (SLLI <typ.UInt64> [32] x))
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(SLLI [c] (MOVBUreg x)) && c <= 56 => (SRLI [56-c] (SLLI <typ.UInt64> [56] x))
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(SLLI [c] (MOVHUreg x)) && c <= 48 => (SRLI [48-c] (SLLI <typ.UInt64> [48] x))
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(SLLI [c] (MOVWUreg x)) && c <= 32 => (SRLI [32-c] (SLLI <typ.UInt64> [32] x))
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// Shift by zero.
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(SRAI [0] x) => x
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@ -17,11 +17,11 @@ func rewriteValueRISCV64latelower(v *Value) bool {
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func rewriteValueRISCV64latelower_OpRISCV64SLLI(v *Value) bool {
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v_0 := v.Args[0]
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b := v.Block
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// match: (SLLI <t> [c] (MOVBUreg x))
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typ := &b.Func.Config.Types
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// match: (SLLI [c] (MOVBUreg x))
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// cond: c <= 56
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// result: (SRLI [56-c] (SLLI <t> [56] x))
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// result: (SRLI [56-c] (SLLI <typ.UInt64> [56] x))
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for {
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t := v.Type
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c := auxIntToInt64(v.AuxInt)
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if v_0.Op != OpRISCV64MOVBUreg {
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break
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@ -32,17 +32,16 @@ func rewriteValueRISCV64latelower_OpRISCV64SLLI(v *Value) bool {
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}
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v.reset(OpRISCV64SRLI)
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v.AuxInt = int64ToAuxInt(56 - c)
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v0 := b.NewValue0(v.Pos, OpRISCV64SLLI, t)
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v0 := b.NewValue0(v.Pos, OpRISCV64SLLI, typ.UInt64)
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v0.AuxInt = int64ToAuxInt(56)
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v0.AddArg(x)
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v.AddArg(v0)
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return true
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}
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// match: (SLLI <t> [c] (MOVHUreg x))
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// match: (SLLI [c] (MOVHUreg x))
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// cond: c <= 48
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// result: (SRLI [48-c] (SLLI <t> [48] x))
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// result: (SRLI [48-c] (SLLI <typ.UInt64> [48] x))
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for {
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t := v.Type
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c := auxIntToInt64(v.AuxInt)
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if v_0.Op != OpRISCV64MOVHUreg {
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break
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@ -53,17 +52,16 @@ func rewriteValueRISCV64latelower_OpRISCV64SLLI(v *Value) bool {
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}
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v.reset(OpRISCV64SRLI)
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v.AuxInt = int64ToAuxInt(48 - c)
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v0 := b.NewValue0(v.Pos, OpRISCV64SLLI, t)
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v0 := b.NewValue0(v.Pos, OpRISCV64SLLI, typ.UInt64)
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v0.AuxInt = int64ToAuxInt(48)
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v0.AddArg(x)
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v.AddArg(v0)
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return true
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}
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// match: (SLLI <t> [c] (MOVWUreg x))
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// match: (SLLI [c] (MOVWUreg x))
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// cond: c <= 32
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// result: (SRLI [32-c] (SLLI <t> [32] x))
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// result: (SRLI [32-c] (SLLI <typ.UInt64> [32] x))
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for {
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t := v.Type
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c := auxIntToInt64(v.AuxInt)
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if v_0.Op != OpRISCV64MOVWUreg {
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break
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@ -74,7 +72,7 @@ func rewriteValueRISCV64latelower_OpRISCV64SLLI(v *Value) bool {
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}
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v.reset(OpRISCV64SRLI)
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v.AuxInt = int64ToAuxInt(32 - c)
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v0 := b.NewValue0(v.Pos, OpRISCV64SLLI, t)
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v0 := b.NewValue0(v.Pos, OpRISCV64SLLI, typ.UInt64)
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v0.AuxInt = int64ToAuxInt(32)
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v0.AddArg(x)
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v.AddArg(v0)
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@ -95,11 +93,11 @@ func rewriteValueRISCV64latelower_OpRISCV64SLLI(v *Value) bool {
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func rewriteValueRISCV64latelower_OpRISCV64SRAI(v *Value) bool {
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v_0 := v.Args[0]
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b := v.Block
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// match: (SRAI <t> [c] (MOVBreg x))
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typ := &b.Func.Config.Types
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// match: (SRAI [c] (MOVBreg x))
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// cond: c < 8
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// result: (SRAI [56+c] (SLLI <t> [56] x))
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// result: (SRAI [56+c] (SLLI <typ.Int64> [56] x))
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for {
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t := v.Type
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c := auxIntToInt64(v.AuxInt)
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if v_0.Op != OpRISCV64MOVBreg {
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break
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@ -110,17 +108,16 @@ func rewriteValueRISCV64latelower_OpRISCV64SRAI(v *Value) bool {
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}
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v.reset(OpRISCV64SRAI)
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v.AuxInt = int64ToAuxInt(56 + c)
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v0 := b.NewValue0(v.Pos, OpRISCV64SLLI, t)
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v0 := b.NewValue0(v.Pos, OpRISCV64SLLI, typ.Int64)
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v0.AuxInt = int64ToAuxInt(56)
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v0.AddArg(x)
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v.AddArg(v0)
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return true
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}
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// match: (SRAI <t> [c] (MOVHreg x))
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// match: (SRAI [c] (MOVHreg x))
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// cond: c < 16
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// result: (SRAI [48+c] (SLLI <t> [48] x))
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// result: (SRAI [48+c] (SLLI <typ.Int64> [48] x))
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for {
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t := v.Type
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c := auxIntToInt64(v.AuxInt)
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if v_0.Op != OpRISCV64MOVHreg {
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break
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@ -131,17 +128,16 @@ func rewriteValueRISCV64latelower_OpRISCV64SRAI(v *Value) bool {
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}
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v.reset(OpRISCV64SRAI)
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v.AuxInt = int64ToAuxInt(48 + c)
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v0 := b.NewValue0(v.Pos, OpRISCV64SLLI, t)
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v0 := b.NewValue0(v.Pos, OpRISCV64SLLI, typ.Int64)
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v0.AuxInt = int64ToAuxInt(48)
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v0.AddArg(x)
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v.AddArg(v0)
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return true
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}
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// match: (SRAI <t> [c] (MOVWreg x))
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// match: (SRAI [c] (MOVWreg x))
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// cond: c < 32
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// result: (SRAI [32+c] (SLLI <t> [32] x))
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// result: (SRAI [32+c] (SLLI <typ.Int64> [32] x))
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for {
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t := v.Type
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c := auxIntToInt64(v.AuxInt)
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if v_0.Op != OpRISCV64MOVWreg {
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break
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@ -152,7 +148,7 @@ func rewriteValueRISCV64latelower_OpRISCV64SRAI(v *Value) bool {
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}
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v.reset(OpRISCV64SRAI)
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v.AuxInt = int64ToAuxInt(32 + c)
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v0 := b.NewValue0(v.Pos, OpRISCV64SLLI, t)
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v0 := b.NewValue0(v.Pos, OpRISCV64SLLI, typ.Int64)
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v0.AuxInt = int64ToAuxInt(32)
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v0.AddArg(x)
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v.AddArg(v0)
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@ -173,11 +169,11 @@ func rewriteValueRISCV64latelower_OpRISCV64SRAI(v *Value) bool {
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func rewriteValueRISCV64latelower_OpRISCV64SRLI(v *Value) bool {
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v_0 := v.Args[0]
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b := v.Block
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// match: (SRLI <t> [c] (MOVBUreg x))
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typ := &b.Func.Config.Types
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// match: (SRLI [c] (MOVBUreg x))
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// cond: c < 8
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// result: (SRLI [56+c] (SLLI <t> [56] x))
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// result: (SRLI [56+c] (SLLI <typ.UInt64> [56] x))
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for {
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t := v.Type
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c := auxIntToInt64(v.AuxInt)
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if v_0.Op != OpRISCV64MOVBUreg {
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break
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@ -188,17 +184,16 @@ func rewriteValueRISCV64latelower_OpRISCV64SRLI(v *Value) bool {
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}
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v.reset(OpRISCV64SRLI)
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v.AuxInt = int64ToAuxInt(56 + c)
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v0 := b.NewValue0(v.Pos, OpRISCV64SLLI, t)
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v0 := b.NewValue0(v.Pos, OpRISCV64SLLI, typ.UInt64)
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v0.AuxInt = int64ToAuxInt(56)
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v0.AddArg(x)
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v.AddArg(v0)
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return true
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}
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// match: (SRLI <t> [c] (MOVHUreg x))
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// match: (SRLI [c] (MOVHUreg x))
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// cond: c < 16
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// result: (SRLI [48+c] (SLLI <t> [48] x))
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// result: (SRLI [48+c] (SLLI <typ.UInt64> [48] x))
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for {
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t := v.Type
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c := auxIntToInt64(v.AuxInt)
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if v_0.Op != OpRISCV64MOVHUreg {
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break
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@ -209,17 +204,16 @@ func rewriteValueRISCV64latelower_OpRISCV64SRLI(v *Value) bool {
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}
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v.reset(OpRISCV64SRLI)
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v.AuxInt = int64ToAuxInt(48 + c)
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v0 := b.NewValue0(v.Pos, OpRISCV64SLLI, t)
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v0 := b.NewValue0(v.Pos, OpRISCV64SLLI, typ.UInt64)
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v0.AuxInt = int64ToAuxInt(48)
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v0.AddArg(x)
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v.AddArg(v0)
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return true
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}
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// match: (SRLI <t> [c] (MOVWUreg x))
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// match: (SRLI [c] (MOVWUreg x))
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// cond: c < 32
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// result: (SRLI [32+c] (SLLI <t> [32] x))
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// result: (SRLI [32+c] (SLLI <typ.UInt64> [32] x))
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for {
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t := v.Type
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c := auxIntToInt64(v.AuxInt)
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if v_0.Op != OpRISCV64MOVWUreg {
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break
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@ -230,7 +224,7 @@ func rewriteValueRISCV64latelower_OpRISCV64SRLI(v *Value) bool {
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}
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v.reset(OpRISCV64SRLI)
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v.AuxInt = int64ToAuxInt(32 + c)
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v0 := b.NewValue0(v.Pos, OpRISCV64SLLI, t)
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v0 := b.NewValue0(v.Pos, OpRISCV64SLLI, typ.UInt64)
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v0.AuxInt = int64ToAuxInt(32)
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v0.AddArg(x)
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v.AddArg(v0)
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