diff options
| author | Bill Wendling <isanbard@gmail.com> | 2007-12-07 21:42:31 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2007-12-07 21:42:31 +0000 |
| commit | 0f940c95d4506f8d04fa2aeda8a79cadb3105fe3 (patch) | |
| tree | 8e87e91a393dc4f8d9ceac9ee8cea7b5bf12e6a3 /lib/Target/PowerPC | |
| parent | 779ccea5b624eae7f2440444e342339aa372f42c (diff) | |
Initial commit of the machine code LICM pass. It successfully hoists this:
_foo:
li r2, 0
LBB1_1: ; bb
li r5, 0
stw r5, 0(r3)
addi r2, r2, 1
addi r3, r3, 4
cmplw cr0, r2, r4
bne cr0, LBB1_1 ; bb
LBB1_2: ; return
blr
to:
_foo:
li r2, 0
li r5, 0
LBB1_1: ; bb
stw r5, 0(r3)
addi r2, r2, 1
addi r3, r3, 4
cmplw cr0, r2, r4
bne cr0, LBB1_1 ; bb
LBB1_2: ; return
blr
ZOMG!! :-)
Moar to come...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44687 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/PowerPC')
| -rw-r--r-- | lib/Target/PowerPC/PPCInstrInfo.td | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/lib/Target/PowerPC/PPCInstrInfo.td b/lib/Target/PowerPC/PPCInstrInfo.td index e1ded36394..6a53a76315 100644 --- a/lib/Target/PowerPC/PPCInstrInfo.td +++ b/lib/Target/PowerPC/PPCInstrInfo.td @@ -684,12 +684,15 @@ def MULLI : DForm_2< 7, (outs GPRC:$rD), (ins GPRC:$rA, s16imm:$imm), def SUBFIC : DForm_2< 8, (outs GPRC:$rD), (ins GPRC:$rA, s16imm:$imm), "subfic $rD, $rA, $imm", IntGeneral, [(set GPRC:$rD, (subc immSExt16:$imm, GPRC:$rA))]>; -def LI : DForm_2_r0<14, (outs GPRC:$rD), (ins symbolLo:$imm), - "li $rD, $imm", IntGeneral, - [(set GPRC:$rD, immSExt16:$imm)]>; -def LIS : DForm_2_r0<15, (outs GPRC:$rD), (ins symbolHi:$imm), - "lis $rD, $imm", IntGeneral, - [(set GPRC:$rD, imm16ShiftedSExt:$imm)]>; + +let isReMaterializable = 1 in { + def LI : DForm_2_r0<14, (outs GPRC:$rD), (ins symbolLo:$imm), + "li $rD, $imm", IntGeneral, + [(set GPRC:$rD, immSExt16:$imm)]>; + def LIS : DForm_2_r0<15, (outs GPRC:$rD), (ins symbolHi:$imm), + "lis $rD, $imm", IntGeneral, + [(set GPRC:$rD, imm16ShiftedSExt:$imm)]>; +} } let PPC970_Unit = 1 in { // FXU Operations. |