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| author | Hal Finkel <hfinkel@anl.gov> | 2012-08-28 02:10:33 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2012-08-28 02:10:33 +0000 |
| commit | 686f2ee226bb7f34425cb7c1c9c6e7546267625d (patch) | |
| tree | 7198752cc6d7a9f4ff05e51ed7176551ecedc5d2 /llvm/lib/Target/PowerPC | |
| parent | b5d177e5b0a4a3bf7d8a96bbe637724e31d86d07 (diff) | |
| download | bcm5719-llvm-686f2ee226bb7f34425cb7c1c9c6e7546267625d.tar.gz bcm5719-llvm-686f2ee226bb7f34425cb7c1c9c6e7546267625d.zip | |
Allow remat of LI on PPC.
Allow load-immediates to be rematerialised in the register coalescer for
PPC. This makes test/CodeGen/PowerPC/big-endian-formal-args.ll fail,
because it relies on a register move getting emitted. The immediate load is
equivalent, so change this test case.
Patch by Tobias von Koch.
llvm-svn: 162727
Diffstat (limited to 'llvm/lib/Target/PowerPC')
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCInstr64Bit.td | 2 | ||||
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCInstrInfo.td | 2 |
2 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/Target/PowerPC/PPCInstr64Bit.td b/llvm/lib/Target/PowerPC/PPCInstr64Bit.td index c2351ecfe23..94d709dee1e 100644 --- a/llvm/lib/Target/PowerPC/PPCInstr64Bit.td +++ b/llvm/lib/Target/PowerPC/PPCInstr64Bit.td @@ -296,12 +296,14 @@ def MFLR8 : XFXForm_1_ext<31, 339, 8, (outs G8RC:$rT), (ins), let PPC970_Unit = 1 in { // FXU Operations. +let isReMaterializable = 1, isAsCheapAsAMove = 1, isMoveImm = 1 in { def LI8 : DForm_2_r0<14, (outs G8RC:$rD), (ins symbolLo64:$imm), "li $rD, $imm", IntSimple, [(set G8RC:$rD, immSExt16:$imm)]>; def LIS8 : DForm_2_r0<15, (outs G8RC:$rD), (ins symbolHi64:$imm), "lis $rD, $imm", IntSimple, [(set G8RC:$rD, imm16ShiftedSExt:$imm)]>; +} // Logical ops. def NAND8: XForm_6<31, 476, (outs G8RC:$rA), (ins G8RC:$rS, G8RC:$rB), diff --git a/llvm/lib/Target/PowerPC/PPCInstrInfo.td b/llvm/lib/Target/PowerPC/PPCInstrInfo.td index 0230b4e7954..864b13afc2c 100644 --- a/llvm/lib/Target/PowerPC/PPCInstrInfo.td +++ b/llvm/lib/Target/PowerPC/PPCInstrInfo.td @@ -972,7 +972,7 @@ def SUBFIC : DForm_2< 8, (outs GPRC:$rD), (ins GPRC:$rA, s16imm:$imm), [(set GPRC:$rD, (subc immSExt16:$imm, GPRC:$rA))]>; } -let isReMaterializable = 1 in { +let isReMaterializable = 1, isAsCheapAsAMove = 1, isMoveImm = 1 in { def LI : DForm_2_r0<14, (outs GPRC:$rD), (ins symbolLo:$imm), "li $rD, $imm", IntSimple, [(set GPRC:$rD, immSExt16:$imm)]>; |
