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[dev.ssa] cmd/compile: finish InvertFlags rewrites

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Change-Id: I61b2d2be18f905a17e8ee765a4494b763a425c55
Reviewed-on: https://go-review.googlesource.com/12794
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Josh Bleecher Snyder 2015-07-27 16:37:22 -07:00
parent 3e3d162f50
commit 71a4c4bb8d
2 changed files with 160 additions and 0 deletions
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8
src/cmd/compile/internal/ssa/gen/AMD64.rules
View File

@ -180,6 +180,14 @@
// reverse ordering of compare instruction
(SETL (InvertFlags x)) -> (SETG x)
(SETG (InvertFlags x)) -> (SETL x)
(SETB (InvertFlags x)) -> (SETA x)
(SETA (InvertFlags x)) -> (SETB x)
(SETLE (InvertFlags x)) -> (SETGE x)
(SETGE (InvertFlags x)) -> (SETLE x)
(SETBE (InvertFlags x)) -> (SETAE x)
(SETAE (InvertFlags x)) -> (SETBE x)
(SETEQ (InvertFlags x)) -> (SETEQ x)
(SETNE (InvertFlags x)) -> (SETNE x)
// sign extended loads
(MOVBQSX (MOVBload ptr mem)) -> (MOVBQSXload ptr mem)

152
src/cmd/compile/internal/ssa/rewriteAMD64.go
View File

@ -1983,6 +1983,101 @@ func rewriteValueAMD64(v *Value, config *Config) bool {
goto end4157ddea9c4f71bfabfd6fa50e1208ed
end4157ddea9c4f71bfabfd6fa50e1208ed:
;
case OpAMD64SETA:
// match: (SETA (InvertFlags x))
// cond:
// result: (SETB x)
{
if v.Args[0].Op != OpAMD64InvertFlags {
goto enda4ac36e94fc279d762b5a6c7c6cc665d
}
x := v.Args[0].Args[0]
v.Op = OpAMD64SETB
v.AuxInt = 0
v.Aux = nil
v.resetArgs()
v.AddArg(x)
return true
}
goto enda4ac36e94fc279d762b5a6c7c6cc665d
enda4ac36e94fc279d762b5a6c7c6cc665d:
;
case OpAMD64SETAE:
// match: (SETAE (InvertFlags x))
// cond:
// result: (SETBE x)
{
if v.Args[0].Op != OpAMD64InvertFlags {
goto end0468f5be6caf682fdea6b91d6648991e
}
x := v.Args[0].Args[0]
v.Op = OpAMD64SETBE
v.AuxInt = 0
v.Aux = nil
v.resetArgs()
v.AddArg(x)
return true
}
goto end0468f5be6caf682fdea6b91d6648991e
end0468f5be6caf682fdea6b91d6648991e:
;
case OpAMD64SETB:
// match: (SETB (InvertFlags x))
// cond:
// result: (SETA x)
{
if v.Args[0].Op != OpAMD64InvertFlags {
goto endc9eba7aa1e54a228570d2f5cc96f3565
}
x := v.Args[0].Args[0]
v.Op = OpAMD64SETA
v.AuxInt = 0
v.Aux = nil
v.resetArgs()
v.AddArg(x)
return true
}
goto endc9eba7aa1e54a228570d2f5cc96f3565
endc9eba7aa1e54a228570d2f5cc96f3565:
;
case OpAMD64SETBE:
// match: (SETBE (InvertFlags x))
// cond:
// result: (SETAE x)
{
if v.Args[0].Op != OpAMD64InvertFlags {
goto end9d9031643469798b14b8cad1f5a7a1ba
}
x := v.Args[0].Args[0]
v.Op = OpAMD64SETAE
v.AuxInt = 0
v.Aux = nil
v.resetArgs()
v.AddArg(x)
return true
}
goto end9d9031643469798b14b8cad1f5a7a1ba
end9d9031643469798b14b8cad1f5a7a1ba:
;
case OpAMD64SETEQ:
// match: (SETEQ (InvertFlags x))
// cond:
// result: (SETEQ x)
{
if v.Args[0].Op != OpAMD64InvertFlags {
goto end5d2039c9368d8c0cfba23b5a85b459e1
}
x := v.Args[0].Args[0]
v.Op = OpAMD64SETEQ
v.AuxInt = 0
v.Aux = nil
v.resetArgs()
v.AddArg(x)
return true
}
goto end5d2039c9368d8c0cfba23b5a85b459e1
end5d2039c9368d8c0cfba23b5a85b459e1:
;
case OpAMD64SETG:
// match: (SETG (InvertFlags x))
// cond:
@ -2002,6 +2097,25 @@ func rewriteValueAMD64(v *Value, config *Config) bool {
goto endf7586738694c9cd0b74ae28bbadb649f
endf7586738694c9cd0b74ae28bbadb649f:
;
case OpAMD64SETGE:
// match: (SETGE (InvertFlags x))
// cond:
// result: (SETLE x)
{
if v.Args[0].Op != OpAMD64InvertFlags {
goto end82c11eff6f842159f564f2dad3d2eedc
}
x := v.Args[0].Args[0]
v.Op = OpAMD64SETLE
v.AuxInt = 0
v.Aux = nil
v.resetArgs()
v.AddArg(x)
return true
}
goto end82c11eff6f842159f564f2dad3d2eedc
end82c11eff6f842159f564f2dad3d2eedc:
;
case OpAMD64SETL:
// match: (SETL (InvertFlags x))
// cond:
@ -2021,6 +2135,44 @@ func rewriteValueAMD64(v *Value, config *Config) bool {
goto ende33160cd86b9d4d3b77e02fb4658d5d3
ende33160cd86b9d4d3b77e02fb4658d5d3:
;
case OpAMD64SETLE:
// match: (SETLE (InvertFlags x))
// cond:
// result: (SETGE x)
{
if v.Args[0].Op != OpAMD64InvertFlags {
goto end9307d96753efbeb888d1c98a6aba7a29
}
x := v.Args[0].Args[0]
v.Op = OpAMD64SETGE
v.AuxInt = 0
v.Aux = nil
v.resetArgs()
v.AddArg(x)
return true
}
goto end9307d96753efbeb888d1c98a6aba7a29
end9307d96753efbeb888d1c98a6aba7a29:
;
case OpAMD64SETNE:
// match: (SETNE (InvertFlags x))
// cond:
// result: (SETNE x)
{
if v.Args[0].Op != OpAMD64InvertFlags {
goto endbc71811b789475308014550f638026eb
}
x := v.Args[0].Args[0]
v.Op = OpAMD64SETNE
v.AuxInt = 0
v.Aux = nil
v.resetArgs()
v.AddArg(x)
return true
}
goto endbc71811b789475308014550f638026eb
endbc71811b789475308014550f638026eb:
;
case OpAMD64SHLQ:
// match: (SHLQ x (MOVQconst [c]))
// cond: