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[dev.ssa] cmd/compile: add simplifying block rewrite rules

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Change-Id: Ia946c259628f84dc7031171456563975d2ad5ea9
Reviewed-on: https://go-review.googlesource.com/13381
Reviewed-by: Keith Randall <khr@golang.org>
This commit is contained in:
Josh Bleecher Snyder 2015-08-07 10:24:57 -07:00
parent b14b8d6bc7
commit 0d91018082
2 changed files with 284 additions and 42 deletions
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28
src/cmd/compile/internal/ssa/gen/AMD64.rules
View File

@ -231,18 +231,30 @@
(ITab (Load ptr mem)) -> (MOVQload ptr mem)
// block rewrites
(If (SETL cmp) yes no) -> (LT cmp yes no)
(If (SETLE cmp) yes no) -> (LE cmp yes no)
(If (SETG cmp) yes no) -> (GT cmp yes no)
(If (SETGE cmp) yes no) -> (GE cmp yes no)
(If (SETEQ cmp) yes no) -> (EQ cmp yes no)
(If (SETNE cmp) yes no) -> (NE cmp yes no)
(If (SETB cmp) yes no) -> (ULT cmp yes no)
(If (SETL cmp) yes no) -> (LT cmp yes no)
(If (SETLE cmp) yes no) -> (LE cmp yes no)
(If (SETG cmp) yes no) -> (GT cmp yes no)
(If (SETGE cmp) yes no) -> (GE cmp yes no)
(If (SETEQ cmp) yes no) -> (EQ cmp yes no)
(If (SETNE cmp) yes no) -> (NE cmp yes no)
(If (SETB cmp) yes no) -> (ULT cmp yes no)
(If (SETBE cmp) yes no) -> (ULE cmp yes no)
(If (SETA cmp) yes no) -> (UGT cmp yes no)
(If (SETA cmp) yes no) -> (UGT cmp yes no)
(If (SETAE cmp) yes no) -> (UGE cmp yes no)
(If cond yes no) -> (NE (TESTB <TypeFlags> cond cond) yes no)
(NE (TESTB (SETL cmp)) yes no) -> (LT cmp yes no)
(NE (TESTB (SETLE cmp)) yes no) -> (LE cmp yes no)
(NE (TESTB (SETG cmp)) yes no) -> (GT cmp yes no)
(NE (TESTB (SETGE cmp)) yes no) -> (GE cmp yes no)
(NE (TESTB (SETEQ cmp)) yes no) -> (EQ cmp yes no)
(NE (TESTB (SETNE cmp)) yes no) -> (NE cmp yes no)
(NE (TESTB (SETB cmp)) yes no) -> (ULT cmp yes no)
(NE (TESTB (SETBE cmp)) yes no) -> (ULE cmp yes no)
(NE (TESTB (SETA cmp)) yes no) -> (UGT cmp yes no)
(NE (TESTB (SETAE cmp)) yes no) -> (UGE cmp yes no)
(StaticCall [argwid] {target} mem) -> (CALLstatic [argwid] {target} mem)
(ClosureCall [argwid] entry closure mem) -> (CALLclosure [argwid] entry closure mem)

298
src/cmd/compile/internal/ssa/rewriteAMD64.go
View File

@ -8173,13 +8173,13 @@ func rewriteBlockAMD64(b *Block) bool {
endf60c0660b6a8aa9565c97fc87f04eb34:
;
case BlockIf:
// match: (If (SETL cmp) yes no)
// match: (If (SETL cmp) yes no)
// cond:
// result: (LT cmp yes no)
// result: (LT cmp yes no)
{
v := b.Control
if v.Op != OpAMD64SETL {
goto ende4d36879bb8e1bd8facaa8c91ba99dcc
goto end94277282f4b83f0c035b23711a075801
}
cmp := v.Args[0]
yes := b.Succs[0]
@ -8190,16 +8190,16 @@ func rewriteBlockAMD64(b *Block) bool {
b.Succs[1] = no
return true
}
goto ende4d36879bb8e1bd8facaa8c91ba99dcc
ende4d36879bb8e1bd8facaa8c91ba99dcc:
goto end94277282f4b83f0c035b23711a075801
end94277282f4b83f0c035b23711a075801:
;
// match: (If (SETLE cmp) yes no)
// cond:
// result: (LE cmp yes no)
// result: (LE cmp yes no)
{
v := b.Control
if v.Op != OpAMD64SETLE {
goto end40df18679690e8f9005d8642fab44654
goto enda84798dd797927b54a9a2987421b2ba2
}
cmp := v.Args[0]
yes := b.Succs[0]
@ -8210,16 +8210,16 @@ func rewriteBlockAMD64(b *Block) bool {
b.Succs[1] = no
return true
}
goto end40df18679690e8f9005d8642fab44654
end40df18679690e8f9005d8642fab44654:
goto enda84798dd797927b54a9a2987421b2ba2
enda84798dd797927b54a9a2987421b2ba2:
;
// match: (If (SETG cmp) yes no)
// match: (If (SETG cmp) yes no)
// cond:
// result: (GT cmp yes no)
// result: (GT cmp yes no)
{
v := b.Control
if v.Op != OpAMD64SETG {
goto endb1faff07a84ae08a4b05a4a7e71eb740
goto end3434ef985979cbf394455ab5b559567c
}
cmp := v.Args[0]
yes := b.Succs[0]
@ -8230,16 +8230,16 @@ func rewriteBlockAMD64(b *Block) bool {
b.Succs[1] = no
return true
}
goto endb1faff07a84ae08a4b05a4a7e71eb740
endb1faff07a84ae08a4b05a4a7e71eb740:
goto end3434ef985979cbf394455ab5b559567c
end3434ef985979cbf394455ab5b559567c:
;
// match: (If (SETGE cmp) yes no)
// cond:
// result: (GE cmp yes no)
// result: (GE cmp yes no)
{
v := b.Control
if v.Op != OpAMD64SETGE {
goto enda9211ccfa5b0ab8eafc0017630c542b6
goto endee147d81d8620a5e23cb92bd9f13cf8d
}
cmp := v.Args[0]
yes := b.Succs[0]
@ -8250,16 +8250,16 @@ func rewriteBlockAMD64(b *Block) bool {
b.Succs[1] = no
return true
}
goto enda9211ccfa5b0ab8eafc0017630c542b6
enda9211ccfa5b0ab8eafc0017630c542b6:
goto endee147d81d8620a5e23cb92bd9f13cf8d
endee147d81d8620a5e23cb92bd9f13cf8d:
;
// match: (If (SETEQ cmp) yes no)
// cond:
// result: (EQ cmp yes no)
// result: (EQ cmp yes no)
{
v := b.Control
if v.Op != OpAMD64SETEQ {
goto endf113deb06abc88613840e6282942921a
goto ende7d85ccc850fc3963c50a91df096de17
}
cmp := v.Args[0]
yes := b.Succs[0]
@ -8270,16 +8270,16 @@ func rewriteBlockAMD64(b *Block) bool {
b.Succs[1] = no
return true
}
goto endf113deb06abc88613840e6282942921a
endf113deb06abc88613840e6282942921a:
goto ende7d85ccc850fc3963c50a91df096de17
ende7d85ccc850fc3963c50a91df096de17:
;
// match: (If (SETNE cmp) yes no)
// cond:
// result: (NE cmp yes no)
// result: (NE cmp yes no)
{
v := b.Control
if v.Op != OpAMD64SETNE {
goto end5ff1403aaf7b543bc454177ab584e4f5
goto endba4b54260ecda1b5731b129c0eb493d0
}
cmp := v.Args[0]
yes := b.Succs[0]
@ -8290,16 +8290,16 @@ func rewriteBlockAMD64(b *Block) bool {
b.Succs[1] = no
return true
}
goto end5ff1403aaf7b543bc454177ab584e4f5
end5ff1403aaf7b543bc454177ab584e4f5:
goto endba4b54260ecda1b5731b129c0eb493d0
endba4b54260ecda1b5731b129c0eb493d0:
;
// match: (If (SETB cmp) yes no)
// match: (If (SETB cmp) yes no)
// cond:
// result: (ULT cmp yes no)
{
v := b.Control
if v.Op != OpAMD64SETB {
goto end04935012db9defeafceef8175f803ea2
goto endf84eedfcd3f18f5c9c3f3d1045a24330
}
cmp := v.Args[0]
yes := b.Succs[0]
@ -8310,8 +8310,8 @@ func rewriteBlockAMD64(b *Block) bool {
b.Succs[1] = no
return true
}
goto end04935012db9defeafceef8175f803ea2
end04935012db9defeafceef8175f803ea2:
goto endf84eedfcd3f18f5c9c3f3d1045a24330
endf84eedfcd3f18f5c9c3f3d1045a24330:
;
// match: (If (SETBE cmp) yes no)
// cond:
@ -8333,13 +8333,13 @@ func rewriteBlockAMD64(b *Block) bool {
goto endfe0178f6f4406945ca8966817d04be60
endfe0178f6f4406945ca8966817d04be60:
;
// match: (If (SETA cmp) yes no)
// match: (If (SETA cmp) yes no)
// cond:
// result: (UGT cmp yes no)
{
v := b.Control
if v.Op != OpAMD64SETA {
goto endbd22a7d56a98d85e4e132ff952dae262
goto end2b5a2d7756bdba01a732bf54d9acdb73
}
cmp := v.Args[0]
yes := b.Succs[0]
@ -8350,8 +8350,8 @@ func rewriteBlockAMD64(b *Block) bool {
b.Succs[1] = no
return true
}
goto endbd22a7d56a98d85e4e132ff952dae262
endbd22a7d56a98d85e4e132ff952dae262:
goto end2b5a2d7756bdba01a732bf54d9acdb73
end2b5a2d7756bdba01a732bf54d9acdb73:
;
// match: (If (SETAE cmp) yes no)
// cond:
@ -8437,6 +8437,236 @@ func rewriteBlockAMD64(b *Block) bool {
end6a408cde0fee0ae7b7da0443c8d902bf:
;
case BlockAMD64NE:
// match: (NE (TESTB (SETL cmp)) yes no)
// cond:
// result: (LT cmp yes no)
{
v := b.Control
if v.Op != OpAMD64TESTB {
goto end0b9ca165d6b395de676eebef94bc62f7
}
if v.Args[0].Op != OpAMD64SETL {
goto end0b9ca165d6b395de676eebef94bc62f7
}
cmp := v.Args[0].Args[0]
yes := b.Succs[0]
no := b.Succs[1]
b.Kind = BlockAMD64LT
b.Control = cmp
b.Succs[0] = yes
b.Succs[1] = no
return true
}
goto end0b9ca165d6b395de676eebef94bc62f7
end0b9ca165d6b395de676eebef94bc62f7:
;
// match: (NE (TESTB (SETLE cmp)) yes no)
// cond:
// result: (LE cmp yes no)
{
v := b.Control
if v.Op != OpAMD64TESTB {
goto endaaba0ee4d0ff8c66a1c3107d2a14c4bc
}
if v.Args[0].Op != OpAMD64SETLE {
goto endaaba0ee4d0ff8c66a1c3107d2a14c4bc
}
cmp := v.Args[0].Args[0]
yes := b.Succs[0]
no := b.Succs[1]
b.Kind = BlockAMD64LE
b.Control = cmp
b.Succs[0] = yes
b.Succs[1] = no
return true
}
goto endaaba0ee4d0ff8c66a1c3107d2a14c4bc
endaaba0ee4d0ff8c66a1c3107d2a14c4bc:
;
// match: (NE (TESTB (SETG cmp)) yes no)
// cond:
// result: (GT cmp yes no)
{
v := b.Control
if v.Op != OpAMD64TESTB {
goto end1b689463137526b36ba9ceed1e76e512
}
if v.Args[0].Op != OpAMD64SETG {
goto end1b689463137526b36ba9ceed1e76e512
}
cmp := v.Args[0].Args[0]
yes := b.Succs[0]
no := b.Succs[1]
b.Kind = BlockAMD64GT
b.Control = cmp
b.Succs[0] = yes
b.Succs[1] = no
return true
}
goto end1b689463137526b36ba9ceed1e76e512
end1b689463137526b36ba9ceed1e76e512:
;
// match: (NE (TESTB (SETGE cmp)) yes no)
// cond:
// result: (GE cmp yes no)
{
v := b.Control
if v.Op != OpAMD64TESTB {
goto end99eefee595c658b997f41577ed853c2e
}
if v.Args[0].Op != OpAMD64SETGE {
goto end99eefee595c658b997f41577ed853c2e
}
cmp := v.Args[0].Args[0]
yes := b.Succs[0]
no := b.Succs[1]
b.Kind = BlockAMD64GE
b.Control = cmp
b.Succs[0] = yes
b.Succs[1] = no
return true
}
goto end99eefee595c658b997f41577ed853c2e
end99eefee595c658b997f41577ed853c2e:
;
// match: (NE (TESTB (SETEQ cmp)) yes no)
// cond:
// result: (EQ cmp yes no)
{
v := b.Control
if v.Op != OpAMD64TESTB {
goto end371b67d3d63e9b92d848b09c3324e8b9
}
if v.Args[0].Op != OpAMD64SETEQ {
goto end371b67d3d63e9b92d848b09c3324e8b9
}
cmp := v.Args[0].Args[0]
yes := b.Succs[0]
no := b.Succs[1]
b.Kind = BlockAMD64EQ
b.Control = cmp
b.Succs[0] = yes
b.Succs[1] = no
return true
}
goto end371b67d3d63e9b92d848b09c3324e8b9
end371b67d3d63e9b92d848b09c3324e8b9:
;
// match: (NE (TESTB (SETNE cmp)) yes no)
// cond:
// result: (NE cmp yes no)
{
v := b.Control
if v.Op != OpAMD64TESTB {
goto endd245f2aac2191d32e57cd2e321daa453
}
if v.Args[0].Op != OpAMD64SETNE {
goto endd245f2aac2191d32e57cd2e321daa453
}
cmp := v.Args[0].Args[0]
yes := b.Succs[0]
no := b.Succs[1]
b.Kind = BlockAMD64NE
b.Control = cmp
b.Succs[0] = yes
b.Succs[1] = no
return true
}
goto endd245f2aac2191d32e57cd2e321daa453
endd245f2aac2191d32e57cd2e321daa453:
;
// match: (NE (TESTB (SETB cmp)) yes no)
// cond:
// result: (ULT cmp yes no)
{
v := b.Control
if v.Op != OpAMD64TESTB {
goto end90c4bec851e734d37457d611b1a5ff28
}
if v.Args[0].Op != OpAMD64SETB {
goto end90c4bec851e734d37457d611b1a5ff28
}
cmp := v.Args[0].Args[0]
yes := b.Succs[0]
no := b.Succs[1]
b.Kind = BlockAMD64ULT
b.Control = cmp
b.Succs[0] = yes
b.Succs[1] = no
return true
}
goto end90c4bec851e734d37457d611b1a5ff28
end90c4bec851e734d37457d611b1a5ff28:
;
// match: (NE (TESTB (SETBE cmp)) yes no)
// cond:
// result: (ULE cmp yes no)
{
v := b.Control
if v.Op != OpAMD64TESTB {
goto end3a68a28114e9b89ee0708823386bc1ee
}
if v.Args[0].Op != OpAMD64SETBE {
goto end3a68a28114e9b89ee0708823386bc1ee
}
cmp := v.Args[0].Args[0]
yes := b.Succs[0]
no := b.Succs[1]
b.Kind = BlockAMD64ULE
b.Control = cmp
b.Succs[0] = yes
b.Succs[1] = no
return true
}
goto end3a68a28114e9b89ee0708823386bc1ee
end3a68a28114e9b89ee0708823386bc1ee:
;
// match: (NE (TESTB (SETA cmp)) yes no)
// cond:
// result: (UGT cmp yes no)
{
v := b.Control
if v.Op != OpAMD64TESTB {
goto end16496f57185756e960d536b057c776c0
}
if v.Args[0].Op != OpAMD64SETA {
goto end16496f57185756e960d536b057c776c0
}
cmp := v.Args[0].Args[0]
yes := b.Succs[0]
no := b.Succs[1]
b.Kind = BlockAMD64UGT
b.Control = cmp
b.Succs[0] = yes
b.Succs[1] = no
return true
}
goto end16496f57185756e960d536b057c776c0
end16496f57185756e960d536b057c776c0:
;
// match: (NE (TESTB (SETAE cmp)) yes no)
// cond:
// result: (UGE cmp yes no)
{
v := b.Control
if v.Op != OpAMD64TESTB {
goto endbd122fd599aeb9e60881a0fa735e2fde
}
if v.Args[0].Op != OpAMD64SETAE {
goto endbd122fd599aeb9e60881a0fa735e2fde
}
cmp := v.Args[0].Args[0]
yes := b.Succs[0]
no := b.Succs[1]
b.Kind = BlockAMD64UGE
b.Control = cmp
b.Succs[0] = yes
b.Succs[1] = no
return true
}
goto endbd122fd599aeb9e60881a0fa735e2fde
endbd122fd599aeb9e60881a0fa735e2fde:
;
// match: (NE (InvertFlags cmp) yes no)
// cond:
// result: (NE cmp yes no)