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cmd/compile: fix simplification rules on arm/arm64

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Fixes #48473

Change-Id: Ic1e918f916eae223a3b530a51a58f03031924670
Reviewed-on: https://go-review.googlesource.com/c/go/+/350913
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
This commit is contained in:
Keith Randall 2021-09-19 14:20:56 -07:00
parent eff27e858b
commit 79159f2e83
5 changed files with 314 additions and 374 deletions
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36
src/cmd/compile/internal/ssa/gen/ARM.rules
View File

@ -1239,24 +1239,24 @@
(AND x (MVN y)) => (BIC x y)
// simplification with *shift ops
(SUBshiftLL x (SLLconst x [c]) [d]) && c==d => (MOVWconst [0])
(SUBshiftRL x (SRLconst x [c]) [d]) && c==d => (MOVWconst [0])
(SUBshiftRA x (SRAconst x [c]) [d]) && c==d => (MOVWconst [0])
(RSBshiftLL x (SLLconst x [c]) [d]) && c==d => (MOVWconst [0])
(RSBshiftRL x (SRLconst x [c]) [d]) && c==d => (MOVWconst [0])
(RSBshiftRA x (SRAconst x [c]) [d]) && c==d => (MOVWconst [0])
(ANDshiftLL x y:(SLLconst x [c]) [d]) && c==d => y
(ANDshiftRL x y:(SRLconst x [c]) [d]) && c==d => y
(ANDshiftRA x y:(SRAconst x [c]) [d]) && c==d => y
(ORshiftLL x y:(SLLconst x [c]) [d]) && c==d => y
(ORshiftRL x y:(SRLconst x [c]) [d]) && c==d => y
(ORshiftRA x y:(SRAconst x [c]) [d]) && c==d => y
(XORshiftLL x (SLLconst x [c]) [d]) && c==d => (MOVWconst [0])
(XORshiftRL x (SRLconst x [c]) [d]) && c==d => (MOVWconst [0])
(XORshiftRA x (SRAconst x [c]) [d]) && c==d => (MOVWconst [0])
(BICshiftLL x (SLLconst x [c]) [d]) && c==d => (MOVWconst [0])
(BICshiftRL x (SRLconst x [c]) [d]) && c==d => (MOVWconst [0])
(BICshiftRA x (SRAconst x [c]) [d]) && c==d => (MOVWconst [0])
(SUBshiftLL (SLLconst x [c]) x [c]) => (MOVWconst [0])
(SUBshiftRL (SRLconst x [c]) x [c]) => (MOVWconst [0])
(SUBshiftRA (SRAconst x [c]) x [c]) => (MOVWconst [0])
(RSBshiftLL (SLLconst x [c]) x [c]) => (MOVWconst [0])
(RSBshiftRL (SRLconst x [c]) x [c]) => (MOVWconst [0])
(RSBshiftRA (SRAconst x [c]) x [c]) => (MOVWconst [0])
(ANDshiftLL y:(SLLconst x [c]) x [c]) => y
(ANDshiftRL y:(SRLconst x [c]) x [c]) => y
(ANDshiftRA y:(SRAconst x [c]) x [c]) => y
(ORshiftLL y:(SLLconst x [c]) x [c]) => y
(ORshiftRL y:(SRLconst x [c]) x [c]) => y
(ORshiftRA y:(SRAconst x [c]) x [c]) => y
(XORshiftLL (SLLconst x [c]) x [c]) => (MOVWconst [0])
(XORshiftRL (SRLconst x [c]) x [c]) => (MOVWconst [0])
(XORshiftRA (SRAconst x [c]) x [c]) => (MOVWconst [0])
(BICshiftLL (SLLconst x [c]) x [c]) => (MOVWconst [0])
(BICshiftRL (SRLconst x [c]) x [c]) => (MOVWconst [0])
(BICshiftRA (SRAconst x [c]) x [c]) => (MOVWconst [0])
(AND x (MVNshiftLL y [c])) => (BICshiftLL x y [c])
(AND x (MVNshiftRL y [c])) => (BICshiftRL x y [c])
(AND x (MVNshiftRA y [c])) => (BICshiftRA x y [c])

54
src/cmd/compile/internal/ssa/gen/ARM64.rules
View File

@ -1723,33 +1723,33 @@
(TSTshiftRO x (MOVDconst [c]) [d]) => (TSTconst x [rotateRight64(c, d)])
// simplification with *shift ops
(SUBshiftLL x (SLLconst x [c]) [d]) && c==d => (MOVDconst [0])
(SUBshiftRL x (SRLconst x [c]) [d]) && c==d => (MOVDconst [0])
(SUBshiftRA x (SRAconst x [c]) [d]) && c==d => (MOVDconst [0])
(ANDshiftLL x y:(SLLconst x [c]) [d]) && c==d => y
(ANDshiftRL x y:(SRLconst x [c]) [d]) && c==d => y
(ANDshiftRA x y:(SRAconst x [c]) [d]) && c==d => y
(ANDshiftRO x y:(RORconst x [c]) [d]) && c==d => y
(ORshiftLL x y:(SLLconst x [c]) [d]) && c==d => y
(ORshiftRL x y:(SRLconst x [c]) [d]) && c==d => y
(ORshiftRA x y:(SRAconst x [c]) [d]) && c==d => y
(ORshiftRO x y:(RORconst x [c]) [d]) && c==d => y
(XORshiftLL x (SLLconst x [c]) [d]) && c==d => (MOVDconst [0])
(XORshiftRL x (SRLconst x [c]) [d]) && c==d => (MOVDconst [0])
(XORshiftRA x (SRAconst x [c]) [d]) && c==d => (MOVDconst [0])
(XORshiftRO x (RORconst x [c]) [d]) && c==d => (MOVDconst [0])
(BICshiftLL x (SLLconst x [c]) [d]) && c==d => (MOVDconst [0])
(BICshiftRL x (SRLconst x [c]) [d]) && c==d => (MOVDconst [0])
(BICshiftRA x (SRAconst x [c]) [d]) && c==d => (MOVDconst [0])
(BICshiftRO x (RORconst x [c]) [d]) && c==d => (MOVDconst [0])
(EONshiftLL x (SLLconst x [c]) [d]) && c==d => (MOVDconst [-1])
(EONshiftRL x (SRLconst x [c]) [d]) && c==d => (MOVDconst [-1])
(EONshiftRA x (SRAconst x [c]) [d]) && c==d => (MOVDconst [-1])
(EONshiftRO x (RORconst x [c]) [d]) && c==d => (MOVDconst [-1])
(ORNshiftLL x (SLLconst x [c]) [d]) && c==d => (MOVDconst [-1])
(ORNshiftRL x (SRLconst x [c]) [d]) && c==d => (MOVDconst [-1])
(ORNshiftRA x (SRAconst x [c]) [d]) && c==d => (MOVDconst [-1])
(ORNshiftRO x (RORconst x [c]) [d]) && c==d => (MOVDconst [-1])
(SUBshiftLL (SLLconst x [c]) x [c]) => (MOVDconst [0])
(SUBshiftRL (SRLconst x [c]) x [c]) => (MOVDconst [0])
(SUBshiftRA (SRAconst x [c]) x [c]) => (MOVDconst [0])
(ANDshiftLL y:(SLLconst x [c]) x [c]) => y
(ANDshiftRL y:(SRLconst x [c]) x [c]) => y
(ANDshiftRA y:(SRAconst x [c]) x [c]) => y
(ANDshiftRO y:(RORconst x [c]) x [c]) => y
(ORshiftLL y:(SLLconst x [c]) x [c]) => y
(ORshiftRL y:(SRLconst x [c]) x [c]) => y
(ORshiftRA y:(SRAconst x [c]) x [c]) => y
(ORshiftRO y:(RORconst x [c]) x [c]) => y
(XORshiftLL (SLLconst x [c]) x [c]) => (MOVDconst [0])
(XORshiftRL (SRLconst x [c]) x [c]) => (MOVDconst [0])
(XORshiftRA (SRAconst x [c]) x [c]) => (MOVDconst [0])
(XORshiftRO (RORconst x [c]) x [c]) => (MOVDconst [0])
(BICshiftLL (SLLconst x [c]) x [c]) => (MOVDconst [0])
(BICshiftRL (SRLconst x [c]) x [c]) => (MOVDconst [0])
(BICshiftRA (SRAconst x [c]) x [c]) => (MOVDconst [0])
(BICshiftRO (RORconst x [c]) x [c]) => (MOVDconst [0])
(EONshiftLL (SLLconst x [c]) x [c]) => (MOVDconst [-1])
(EONshiftRL (SRLconst x [c]) x [c]) => (MOVDconst [-1])
(EONshiftRA (SRAconst x [c]) x [c]) => (MOVDconst [-1])
(EONshiftRO (RORconst x [c]) x [c]) => (MOVDconst [-1])
(ORNshiftLL (SLLconst x [c]) x [c]) => (MOVDconst [-1])
(ORNshiftRL (SRLconst x [c]) x [c]) => (MOVDconst [-1])
(ORNshiftRA (SRAconst x [c]) x [c]) => (MOVDconst [-1])
(ORNshiftRO (RORconst x [c]) x [c]) => (MOVDconst [-1])
// Generate rotates with const shift
(ADDshiftLL [c] (SRLconst x [64-c]) x) => (RORconst [64-c] x)

228
src/cmd/compile/internal/ssa/rewriteARM.go
View File

@ -2655,18 +2655,16 @@ func rewriteValueARM_OpARMANDshiftLL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (ANDshiftLL x y:(SLLconst x [c]) [d])
// cond: c==d
// match: (ANDshiftLL y:(SLLconst x [c]) x [c])
// result: y
for {
d := auxIntToInt32(v.AuxInt)
x := v_0
y := v_1
if y.Op != OpARMSLLconst {
c := auxIntToInt32(v.AuxInt)
y := v_0
if y.Op != OpARMSLLconst || auxIntToInt32(y.AuxInt) != c {
break
}
c := auxIntToInt32(y.AuxInt)
if x != y.Args[0] || !(c == d) {
x := y.Args[0]
if x != v_1 {
break
}
v.copyOf(y)
@ -2750,18 +2748,16 @@ func rewriteValueARM_OpARMANDshiftRA(v *Value) bool {
v.AddArg(x)
return true
}
// match: (ANDshiftRA x y:(SRAconst x [c]) [d])
// cond: c==d
// match: (ANDshiftRA y:(SRAconst x [c]) x [c])
// result: y
for {
d := auxIntToInt32(v.AuxInt)
x := v_0
y := v_1
if y.Op != OpARMSRAconst {
c := auxIntToInt32(v.AuxInt)
y := v_0
if y.Op != OpARMSRAconst || auxIntToInt32(y.AuxInt) != c {
break
}
c := auxIntToInt32(y.AuxInt)
if x != y.Args[0] || !(c == d) {
x := y.Args[0]
if x != v_1 {
break
}
v.copyOf(y)
@ -2845,18 +2841,16 @@ func rewriteValueARM_OpARMANDshiftRL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (ANDshiftRL x y:(SRLconst x [c]) [d])
// cond: c==d
// match: (ANDshiftRL y:(SRLconst x [c]) x [c])
// result: y
for {
d := auxIntToInt32(v.AuxInt)
x := v_0
y := v_1
if y.Op != OpARMSRLconst {
c := auxIntToInt32(v.AuxInt)
y := v_0
if y.Op != OpARMSRLconst || auxIntToInt32(y.AuxInt) != c {
break
}
c := auxIntToInt32(y.AuxInt)
if x != y.Args[0] || !(c == d) {
x := y.Args[0]
if x != v_1 {
break
}
v.copyOf(y)
@ -3144,17 +3138,15 @@ func rewriteValueARM_OpARMBICshiftLL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (BICshiftLL x (SLLconst x [c]) [d])
// cond: c==d
// match: (BICshiftLL (SLLconst x [c]) x [c])
// result: (MOVWconst [0])
for {
d := auxIntToInt32(v.AuxInt)
x := v_0
if v_1.Op != OpARMSLLconst {
c := auxIntToInt32(v.AuxInt)
if v_0.Op != OpARMSLLconst || auxIntToInt32(v_0.AuxInt) != c {
break
}
c := auxIntToInt32(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARMMOVWconst)
@ -3204,17 +3196,15 @@ func rewriteValueARM_OpARMBICshiftRA(v *Value) bool {
v.AddArg(x)
return true
}
// match: (BICshiftRA x (SRAconst x [c]) [d])
// cond: c==d
// match: (BICshiftRA (SRAconst x [c]) x [c])
// result: (MOVWconst [0])
for {
d := auxIntToInt32(v.AuxInt)
x := v_0
if v_1.Op != OpARMSRAconst {
c := auxIntToInt32(v.AuxInt)
if v_0.Op != OpARMSRAconst || auxIntToInt32(v_0.AuxInt) != c {
break
}
c := auxIntToInt32(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARMMOVWconst)
@ -3264,17 +3254,15 @@ func rewriteValueARM_OpARMBICshiftRL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (BICshiftRL x (SRLconst x [c]) [d])
// cond: c==d
// match: (BICshiftRL (SRLconst x [c]) x [c])
// result: (MOVWconst [0])
for {
d := auxIntToInt32(v.AuxInt)
x := v_0
if v_1.Op != OpARMSRLconst {
c := auxIntToInt32(v.AuxInt)
if v_0.Op != OpARMSRLconst || auxIntToInt32(v_0.AuxInt) != c {
break
}
c := auxIntToInt32(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARMMOVWconst)
@ -8657,18 +8645,16 @@ func rewriteValueARM_OpARMORshiftLL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (ORshiftLL x y:(SLLconst x [c]) [d])
// cond: c==d
// match: (ORshiftLL y:(SLLconst x [c]) x [c])
// result: y
for {
d := auxIntToInt32(v.AuxInt)
x := v_0
y := v_1
if y.Op != OpARMSLLconst {
c := auxIntToInt32(v.AuxInt)
y := v_0
if y.Op != OpARMSLLconst || auxIntToInt32(y.AuxInt) != c {
break
}
c := auxIntToInt32(y.AuxInt)
if x != y.Args[0] || !(c == d) {
x := y.Args[0]
if x != v_1 {
break
}
v.copyOf(y)
@ -8752,18 +8738,16 @@ func rewriteValueARM_OpARMORshiftRA(v *Value) bool {
v.AddArg(x)
return true
}
// match: (ORshiftRA x y:(SRAconst x [c]) [d])
// cond: c==d
// match: (ORshiftRA y:(SRAconst x [c]) x [c])
// result: y
for {
d := auxIntToInt32(v.AuxInt)
x := v_0
y := v_1
if y.Op != OpARMSRAconst {
c := auxIntToInt32(v.AuxInt)
y := v_0
if y.Op != OpARMSRAconst || auxIntToInt32(y.AuxInt) != c {
break
}
c := auxIntToInt32(y.AuxInt)
if x != y.Args[0] || !(c == d) {
x := y.Args[0]
if x != v_1 {
break
}
v.copyOf(y)
@ -8863,18 +8847,16 @@ func rewriteValueARM_OpARMORshiftRL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (ORshiftRL x y:(SRLconst x [c]) [d])
// cond: c==d
// match: (ORshiftRL y:(SRLconst x [c]) x [c])
// result: y
for {
d := auxIntToInt32(v.AuxInt)
x := v_0
y := v_1
if y.Op != OpARMSRLconst {
c := auxIntToInt32(v.AuxInt)
y := v_0
if y.Op != OpARMSRLconst || auxIntToInt32(y.AuxInt) != c {
break
}
c := auxIntToInt32(y.AuxInt)
if x != y.Args[0] || !(c == d) {
x := y.Args[0]
if x != v_1 {
break
}
v.copyOf(y)
@ -9471,17 +9453,15 @@ func rewriteValueARM_OpARMRSBshiftLL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (RSBshiftLL x (SLLconst x [c]) [d])
// cond: c==d
// match: (RSBshiftLL (SLLconst x [c]) x [c])
// result: (MOVWconst [0])
for {
d := auxIntToInt32(v.AuxInt)
x := v_0
if v_1.Op != OpARMSLLconst {
c := auxIntToInt32(v.AuxInt)
if v_0.Op != OpARMSLLconst || auxIntToInt32(v_0.AuxInt) != c {
break
}
c := auxIntToInt32(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARMMOVWconst)
@ -9566,17 +9546,15 @@ func rewriteValueARM_OpARMRSBshiftRA(v *Value) bool {
v.AddArg(x)
return true
}
// match: (RSBshiftRA x (SRAconst x [c]) [d])
// cond: c==d
// match: (RSBshiftRA (SRAconst x [c]) x [c])
// result: (MOVWconst [0])
for {
d := auxIntToInt32(v.AuxInt)
x := v_0
if v_1.Op != OpARMSRAconst {
c := auxIntToInt32(v.AuxInt)
if v_0.Op != OpARMSRAconst || auxIntToInt32(v_0.AuxInt) != c {
break
}
c := auxIntToInt32(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARMMOVWconst)
@ -9661,17 +9639,15 @@ func rewriteValueARM_OpARMRSBshiftRL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (RSBshiftRL x (SRLconst x [c]) [d])
// cond: c==d
// match: (RSBshiftRL (SRLconst x [c]) x [c])
// result: (MOVWconst [0])
for {
d := auxIntToInt32(v.AuxInt)
x := v_0
if v_1.Op != OpARMSRLconst {
c := auxIntToInt32(v.AuxInt)
if v_0.Op != OpARMSRLconst || auxIntToInt32(v_0.AuxInt) != c {
break
}
c := auxIntToInt32(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARMMOVWconst)
@ -11571,17 +11547,15 @@ func rewriteValueARM_OpARMSUBshiftLL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (SUBshiftLL x (SLLconst x [c]) [d])
// cond: c==d
// match: (SUBshiftLL (SLLconst x [c]) x [c])
// result: (MOVWconst [0])
for {
d := auxIntToInt32(v.AuxInt)
x := v_0
if v_1.Op != OpARMSLLconst {
c := auxIntToInt32(v.AuxInt)
if v_0.Op != OpARMSLLconst || auxIntToInt32(v_0.AuxInt) != c {
break
}
c := auxIntToInt32(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARMMOVWconst)
@ -11666,17 +11640,15 @@ func rewriteValueARM_OpARMSUBshiftRA(v *Value) bool {
v.AddArg(x)
return true
}
// match: (SUBshiftRA x (SRAconst x [c]) [d])
// cond: c==d
// match: (SUBshiftRA (SRAconst x [c]) x [c])
// result: (MOVWconst [0])
for {
d := auxIntToInt32(v.AuxInt)
x := v_0
if v_1.Op != OpARMSRAconst {
c := auxIntToInt32(v.AuxInt)
if v_0.Op != OpARMSRAconst || auxIntToInt32(v_0.AuxInt) != c {
break
}
c := auxIntToInt32(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARMMOVWconst)
@ -11761,17 +11733,15 @@ func rewriteValueARM_OpARMSUBshiftRL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (SUBshiftRL x (SRLconst x [c]) [d])
// cond: c==d
// match: (SUBshiftRL (SRLconst x [c]) x [c])
// result: (MOVWconst [0])
for {
d := auxIntToInt32(v.AuxInt)
x := v_0
if v_1.Op != OpARMSRLconst {
c := auxIntToInt32(v.AuxInt)
if v_0.Op != OpARMSRLconst || auxIntToInt32(v_0.AuxInt) != c {
break
}
c := auxIntToInt32(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARMMOVWconst)
@ -12834,17 +12804,15 @@ func rewriteValueARM_OpARMXORshiftLL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (XORshiftLL x (SLLconst x [c]) [d])
// cond: c==d
// match: (XORshiftLL (SLLconst x [c]) x [c])
// result: (MOVWconst [0])
for {
d := auxIntToInt32(v.AuxInt)
x := v_0
if v_1.Op != OpARMSLLconst {
c := auxIntToInt32(v.AuxInt)
if v_0.Op != OpARMSLLconst || auxIntToInt32(v_0.AuxInt) != c {
break
}
c := auxIntToInt32(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARMMOVWconst)
@ -12929,17 +12897,15 @@ func rewriteValueARM_OpARMXORshiftRA(v *Value) bool {
v.AddArg(x)
return true
}
// match: (XORshiftRA x (SRAconst x [c]) [d])
// cond: c==d
// match: (XORshiftRA (SRAconst x [c]) x [c])
// result: (MOVWconst [0])
for {
d := auxIntToInt32(v.AuxInt)
x := v_0
if v_1.Op != OpARMSRAconst {
c := auxIntToInt32(v.AuxInt)
if v_0.Op != OpARMSRAconst || auxIntToInt32(v_0.AuxInt) != c {
break
}
c := auxIntToInt32(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARMMOVWconst)
@ -13040,17 +13006,15 @@ func rewriteValueARM_OpARMXORshiftRL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (XORshiftRL x (SRLconst x [c]) [d])
// cond: c==d
// match: (XORshiftRL (SRLconst x [c]) x [c])
// result: (MOVWconst [0])
for {
d := auxIntToInt32(v.AuxInt)
x := v_0
if v_1.Op != OpARMSRLconst {
c := auxIntToInt32(v.AuxInt)
if v_0.Op != OpARMSRLconst || auxIntToInt32(v_0.AuxInt) != c {
break
}
c := auxIntToInt32(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARMMOVWconst)

340
src/cmd/compile/internal/ssa/rewriteARM64.go
View File

@ -2314,18 +2314,16 @@ func rewriteValueARM64_OpARM64ANDshiftLL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (ANDshiftLL x y:(SLLconst x [c]) [d])
// cond: c==d
// match: (ANDshiftLL y:(SLLconst x [c]) x [c])
// result: y
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
y := v_1
if y.Op != OpARM64SLLconst {
c := auxIntToInt64(v.AuxInt)
y := v_0
if y.Op != OpARM64SLLconst || auxIntToInt64(y.AuxInt) != c {
break
}
c := auxIntToInt64(y.AuxInt)
if x != y.Args[0] || !(c == d) {
x := y.Args[0]
if x != v_1 {
break
}
v.copyOf(y)
@ -2368,18 +2366,16 @@ func rewriteValueARM64_OpARM64ANDshiftRA(v *Value) bool {
v.AddArg(x)
return true
}
// match: (ANDshiftRA x y:(SRAconst x [c]) [d])
// cond: c==d
// match: (ANDshiftRA y:(SRAconst x [c]) x [c])
// result: y
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
y := v_1
if y.Op != OpARM64SRAconst {
c := auxIntToInt64(v.AuxInt)
y := v_0
if y.Op != OpARM64SRAconst || auxIntToInt64(y.AuxInt) != c {
break
}
c := auxIntToInt64(y.AuxInt)
if x != y.Args[0] || !(c == d) {
x := y.Args[0]
if x != v_1 {
break
}
v.copyOf(y)
@ -2422,18 +2418,16 @@ func rewriteValueARM64_OpARM64ANDshiftRL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (ANDshiftRL x y:(SRLconst x [c]) [d])
// cond: c==d
// match: (ANDshiftRL y:(SRLconst x [c]) x [c])
// result: y
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
y := v_1
if y.Op != OpARM64SRLconst {
c := auxIntToInt64(v.AuxInt)
y := v_0
if y.Op != OpARM64SRLconst || auxIntToInt64(y.AuxInt) != c {
break
}
c := auxIntToInt64(y.AuxInt)
if x != y.Args[0] || !(c == d) {
x := y.Args[0]
if x != v_1 {
break
}
v.copyOf(y)
@ -2476,18 +2470,16 @@ func rewriteValueARM64_OpARM64ANDshiftRO(v *Value) bool {
v.AddArg(x)
return true
}
// match: (ANDshiftRO x y:(RORconst x [c]) [d])
// cond: c==d
// match: (ANDshiftRO y:(RORconst x [c]) x [c])
// result: y
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
y := v_1
if y.Op != OpARM64RORconst {
c := auxIntToInt64(v.AuxInt)
y := v_0
if y.Op != OpARM64RORconst || auxIntToInt64(y.AuxInt) != c {
break
}
c := auxIntToInt64(y.AuxInt)
if x != y.Args[0] || !(c == d) {
x := y.Args[0]
if x != v_1 {
break
}
v.copyOf(y)
@ -2617,17 +2609,15 @@ func rewriteValueARM64_OpARM64BICshiftLL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (BICshiftLL x (SLLconst x [c]) [d])
// cond: c==d
// match: (BICshiftLL (SLLconst x [c]) x [c])
// result: (MOVDconst [0])
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
if v_1.Op != OpARM64SLLconst {
c := auxIntToInt64(v.AuxInt)
if v_0.Op != OpARM64SLLconst || auxIntToInt64(v_0.AuxInt) != c {
break
}
c := auxIntToInt64(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARM64MOVDconst)
@ -2653,17 +2643,15 @@ func rewriteValueARM64_OpARM64BICshiftRA(v *Value) bool {
v.AddArg(x)
return true
}
// match: (BICshiftRA x (SRAconst x [c]) [d])
// cond: c==d
// match: (BICshiftRA (SRAconst x [c]) x [c])
// result: (MOVDconst [0])
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
if v_1.Op != OpARM64SRAconst {
c := auxIntToInt64(v.AuxInt)
if v_0.Op != OpARM64SRAconst || auxIntToInt64(v_0.AuxInt) != c {
break
}
c := auxIntToInt64(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARM64MOVDconst)
@ -2689,17 +2677,15 @@ func rewriteValueARM64_OpARM64BICshiftRL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (BICshiftRL x (SRLconst x [c]) [d])
// cond: c==d
// match: (BICshiftRL (SRLconst x [c]) x [c])
// result: (MOVDconst [0])
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
if v_1.Op != OpARM64SRLconst {
c := auxIntToInt64(v.AuxInt)
if v_0.Op != OpARM64SRLconst || auxIntToInt64(v_0.AuxInt) != c {
break
}
c := auxIntToInt64(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARM64MOVDconst)
@ -2725,17 +2711,15 @@ func rewriteValueARM64_OpARM64BICshiftRO(v *Value) bool {
v.AddArg(x)
return true
}
// match: (BICshiftRO x (RORconst x [c]) [d])
// cond: c==d
// match: (BICshiftRO (RORconst x [c]) x [c])
// result: (MOVDconst [0])
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
if v_1.Op != OpARM64RORconst {
c := auxIntToInt64(v.AuxInt)
if v_0.Op != OpARM64RORconst || auxIntToInt64(v_0.AuxInt) != c {
break
}
c := auxIntToInt64(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARM64MOVDconst)
@ -4122,17 +4106,15 @@ func rewriteValueARM64_OpARM64EONshiftLL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (EONshiftLL x (SLLconst x [c]) [d])
// cond: c==d
// match: (EONshiftLL (SLLconst x [c]) x [c])
// result: (MOVDconst [-1])
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
if v_1.Op != OpARM64SLLconst {
c := auxIntToInt64(v.AuxInt)
if v_0.Op != OpARM64SLLconst || auxIntToInt64(v_0.AuxInt) != c {
break
}
c := auxIntToInt64(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARM64MOVDconst)
@ -4158,17 +4140,15 @@ func rewriteValueARM64_OpARM64EONshiftRA(v *Value) bool {
v.AddArg(x)
return true
}
// match: (EONshiftRA x (SRAconst x [c]) [d])
// cond: c==d
// match: (EONshiftRA (SRAconst x [c]) x [c])
// result: (MOVDconst [-1])
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
if v_1.Op != OpARM64SRAconst {
c := auxIntToInt64(v.AuxInt)
if v_0.Op != OpARM64SRAconst || auxIntToInt64(v_0.AuxInt) != c {
break
}
c := auxIntToInt64(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARM64MOVDconst)
@ -4194,17 +4174,15 @@ func rewriteValueARM64_OpARM64EONshiftRL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (EONshiftRL x (SRLconst x [c]) [d])
// cond: c==d
// match: (EONshiftRL (SRLconst x [c]) x [c])
// result: (MOVDconst [-1])
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
if v_1.Op != OpARM64SRLconst {
c := auxIntToInt64(v.AuxInt)
if v_0.Op != OpARM64SRLconst || auxIntToInt64(v_0.AuxInt) != c {
break
}
c := auxIntToInt64(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARM64MOVDconst)
@ -4230,17 +4208,15 @@ func rewriteValueARM64_OpARM64EONshiftRO(v *Value) bool {
v.AddArg(x)
return true
}
// match: (EONshiftRO x (RORconst x [c]) [d])
// cond: c==d
// match: (EONshiftRO (RORconst x [c]) x [c])
// result: (MOVDconst [-1])
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
if v_1.Op != OpARM64RORconst {
c := auxIntToInt64(v.AuxInt)
if v_0.Op != OpARM64RORconst || auxIntToInt64(v_0.AuxInt) != c {
break
}
c := auxIntToInt64(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARM64MOVDconst)
@ -18219,17 +18195,15 @@ func rewriteValueARM64_OpARM64ORNshiftLL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (ORNshiftLL x (SLLconst x [c]) [d])
// cond: c==d
// match: (ORNshiftLL (SLLconst x [c]) x [c])
// result: (MOVDconst [-1])
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
if v_1.Op != OpARM64SLLconst {
c := auxIntToInt64(v.AuxInt)
if v_0.Op != OpARM64SLLconst || auxIntToInt64(v_0.AuxInt) != c {
break
}
c := auxIntToInt64(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARM64MOVDconst)
@ -18255,17 +18229,15 @@ func rewriteValueARM64_OpARM64ORNshiftRA(v *Value) bool {
v.AddArg(x)
return true
}
// match: (ORNshiftRA x (SRAconst x [c]) [d])
// cond: c==d
// match: (ORNshiftRA (SRAconst x [c]) x [c])
// result: (MOVDconst [-1])
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
if v_1.Op != OpARM64SRAconst {
c := auxIntToInt64(v.AuxInt)
if v_0.Op != OpARM64SRAconst || auxIntToInt64(v_0.AuxInt) != c {
break
}
c := auxIntToInt64(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARM64MOVDconst)
@ -18291,17 +18263,15 @@ func rewriteValueARM64_OpARM64ORNshiftRL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (ORNshiftRL x (SRLconst x [c]) [d])
// cond: c==d
// match: (ORNshiftRL (SRLconst x [c]) x [c])
// result: (MOVDconst [-1])
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
if v_1.Op != OpARM64SRLconst {
c := auxIntToInt64(v.AuxInt)
if v_0.Op != OpARM64SRLconst || auxIntToInt64(v_0.AuxInt) != c {
break
}
c := auxIntToInt64(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARM64MOVDconst)
@ -18327,17 +18297,15 @@ func rewriteValueARM64_OpARM64ORNshiftRO(v *Value) bool {
v.AddArg(x)
return true
}
// match: (ORNshiftRO x (RORconst x [c]) [d])
// cond: c==d
// match: (ORNshiftRO (RORconst x [c]) x [c])
// result: (MOVDconst [-1])
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
if v_1.Op != OpARM64RORconst {
c := auxIntToInt64(v.AuxInt)
if v_0.Op != OpARM64RORconst || auxIntToInt64(v_0.AuxInt) != c {
break
}
c := auxIntToInt64(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARM64MOVDconst)
@ -18450,18 +18418,16 @@ func rewriteValueARM64_OpARM64ORshiftLL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (ORshiftLL x y:(SLLconst x [c]) [d])
// cond: c==d
// match: (ORshiftLL y:(SLLconst x [c]) x [c])
// result: y
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
y := v_1
if y.Op != OpARM64SLLconst {
c := auxIntToInt64(v.AuxInt)
y := v_0
if y.Op != OpARM64SLLconst || auxIntToInt64(y.AuxInt) != c {
break
}
c := auxIntToInt64(y.AuxInt)
if x != y.Args[0] || !(c == d) {
x := y.Args[0]
if x != v_1 {
break
}
v.copyOf(y)
@ -20130,18 +20096,16 @@ func rewriteValueARM64_OpARM64ORshiftRA(v *Value) bool {
v.AddArg(x)
return true
}
// match: (ORshiftRA x y:(SRAconst x [c]) [d])
// cond: c==d
// match: (ORshiftRA y:(SRAconst x [c]) x [c])
// result: y
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
y := v_1
if y.Op != OpARM64SRAconst {
c := auxIntToInt64(v.AuxInt)
y := v_0
if y.Op != OpARM64SRAconst || auxIntToInt64(y.AuxInt) != c {
break
}
c := auxIntToInt64(y.AuxInt)
if x != y.Args[0] || !(c == d) {
x := y.Args[0]
if x != v_1 {
break
}
v.copyOf(y)
@ -20184,18 +20148,16 @@ func rewriteValueARM64_OpARM64ORshiftRL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (ORshiftRL x y:(SRLconst x [c]) [d])
// cond: c==d
// match: (ORshiftRL y:(SRLconst x [c]) x [c])
// result: y
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
y := v_1
if y.Op != OpARM64SRLconst {
c := auxIntToInt64(v.AuxInt)
y := v_0
if y.Op != OpARM64SRLconst || auxIntToInt64(y.AuxInt) != c {
break
}
c := auxIntToInt64(y.AuxInt)
if x != y.Args[0] || !(c == d) {
x := y.Args[0]
if x != v_1 {
break
}
v.copyOf(y)
@ -20318,18 +20280,16 @@ func rewriteValueARM64_OpARM64ORshiftRO(v *Value) bool {
v.AddArg(x)
return true
}
// match: (ORshiftRO x y:(RORconst x [c]) [d])
// cond: c==d
// match: (ORshiftRO y:(RORconst x [c]) x [c])
// result: y
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
y := v_1
if y.Op != OpARM64RORconst {
c := auxIntToInt64(v.AuxInt)
y := v_0
if y.Op != OpARM64RORconst || auxIntToInt64(y.AuxInt) != c {
break
}
c := auxIntToInt64(y.AuxInt)
if x != y.Args[0] || !(c == d) {
x := y.Args[0]
if x != v_1 {
break
}
v.copyOf(y)
@ -21389,17 +21349,15 @@ func rewriteValueARM64_OpARM64SUBshiftLL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (SUBshiftLL x (SLLconst x [c]) [d])
// cond: c==d
// match: (SUBshiftLL (SLLconst x [c]) x [c])
// result: (MOVDconst [0])
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
if v_1.Op != OpARM64SLLconst {
c := auxIntToInt64(v.AuxInt)
if v_0.Op != OpARM64SLLconst || auxIntToInt64(v_0.AuxInt) != c {
break
}
c := auxIntToInt64(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARM64MOVDconst)
@ -21425,17 +21383,15 @@ func rewriteValueARM64_OpARM64SUBshiftRA(v *Value) bool {
v.AddArg(x)
return true
}
// match: (SUBshiftRA x (SRAconst x [c]) [d])
// cond: c==d
// match: (SUBshiftRA (SRAconst x [c]) x [c])
// result: (MOVDconst [0])
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
if v_1.Op != OpARM64SRAconst {
c := auxIntToInt64(v.AuxInt)
if v_0.Op != OpARM64SRAconst || auxIntToInt64(v_0.AuxInt) != c {
break
}
c := auxIntToInt64(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARM64MOVDconst)
@ -21461,17 +21417,15 @@ func rewriteValueARM64_OpARM64SUBshiftRL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (SUBshiftRL x (SRLconst x [c]) [d])
// cond: c==d
// match: (SUBshiftRL (SRLconst x [c]) x [c])
// result: (MOVDconst [0])
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
if v_1.Op != OpARM64SRLconst {
c := auxIntToInt64(v.AuxInt)
if v_0.Op != OpARM64SRLconst || auxIntToInt64(v_0.AuxInt) != c {
break
}
c := auxIntToInt64(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARM64MOVDconst)
@ -22641,17 +22595,15 @@ func rewriteValueARM64_OpARM64XORshiftLL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (XORshiftLL x (SLLconst x [c]) [d])
// cond: c==d
// match: (XORshiftLL (SLLconst x [c]) x [c])
// result: (MOVDconst [0])
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
if v_1.Op != OpARM64SLLconst {
c := auxIntToInt64(v.AuxInt)
if v_0.Op != OpARM64SLLconst || auxIntToInt64(v_0.AuxInt) != c {
break
}
c := auxIntToInt64(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARM64MOVDconst)
@ -22853,17 +22805,15 @@ func rewriteValueARM64_OpARM64XORshiftRA(v *Value) bool {
v.AddArg(x)
return true
}
// match: (XORshiftRA x (SRAconst x [c]) [d])
// cond: c==d
// match: (XORshiftRA (SRAconst x [c]) x [c])
// result: (MOVDconst [0])
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
if v_1.Op != OpARM64SRAconst {
c := auxIntToInt64(v.AuxInt)
if v_0.Op != OpARM64SRAconst || auxIntToInt64(v_0.AuxInt) != c {
break
}
c := auxIntToInt64(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARM64MOVDconst)
@ -22907,17 +22857,15 @@ func rewriteValueARM64_OpARM64XORshiftRL(v *Value) bool {
v.AddArg(x)
return true
}
// match: (XORshiftRL x (SRLconst x [c]) [d])
// cond: c==d
// match: (XORshiftRL (SRLconst x [c]) x [c])
// result: (MOVDconst [0])
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
if v_1.Op != OpARM64SRLconst {
c := auxIntToInt64(v.AuxInt)
if v_0.Op != OpARM64SRLconst || auxIntToInt64(v_0.AuxInt) != c {
break
}
c := auxIntToInt64(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARM64MOVDconst)
@ -22995,17 +22943,15 @@ func rewriteValueARM64_OpARM64XORshiftRO(v *Value) bool {
v.AddArg(x)
return true
}
// match: (XORshiftRO x (RORconst x [c]) [d])
// cond: c==d
// match: (XORshiftRO (RORconst x [c]) x [c])
// result: (MOVDconst [0])
for {
d := auxIntToInt64(v.AuxInt)
x := v_0
if v_1.Op != OpARM64RORconst {
c := auxIntToInt64(v.AuxInt)
if v_0.Op != OpARM64RORconst || auxIntToInt64(v_0.AuxInt) != c {
break
}
c := auxIntToInt64(v_1.AuxInt)
if x != v_1.Args[0] || !(c == d) {
x := v_0.Args[0]
if x != v_1 {
break
}
v.reset(OpARM64MOVDconst)

30
test/fixedbugs/issue48473.go Normal file
View File

@ -0,0 +1,30 @@
// run
// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import "fmt"
func f(x uint64) uint64 {
s := "\x04"
c := s[0]
return x - x<<c<<4
}
func g(x uint32) uint32 {
s := "\x04"
c := s[0]
return x - x<<c<<4
}
func main() {
if want, got := uint64(0xffffffffffffff01), f(1); want != got {
panic(fmt.Sprintf("want %x got %x", want, got))
}
if want, got := uint32(0xffffff01), g(1); want != got {
panic(fmt.Sprintf("want %x got %x", want, got))
}
}