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| author | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-10-01 14:56:23 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-10-01 14:56:23 +0000 |
| commit | 185ef05ad6fdcaad1e831020b1f88d0046dd15d6 (patch) | |
| tree | 08ebf3788fe3c4a93e07dbc8102b136e5cc9dff4 /lib | |
| parent | ad366a3f67679a56d25464dc2bcad3a0a6a51780 (diff) | |
| download | external_llvm-185ef05ad6fdcaad1e831020b1f88d0046dd15d6.zip external_llvm-185ef05ad6fdcaad1e831020b1f88d0046dd15d6.tar.gz external_llvm-185ef05ad6fdcaad1e831020b1f88d0046dd15d6.tar.bz2 | |
[SystemZ] Add comparisons of large immediates using high words
There are no corresponding patterns for small immediates because they would
prevent the use of fused compare-and-branch instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191775 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/SystemZ/SystemZInstrInfo.cpp | 8 | ||||
| -rw-r--r-- | lib/Target/SystemZ/SystemZInstrInfo.td | 14 |
2 files changed, 20 insertions, 2 deletions
diff --git a/lib/Target/SystemZ/SystemZInstrInfo.cpp b/lib/Target/SystemZ/SystemZInstrInfo.cpp index acefd9c..9b50a3c 100644 --- a/lib/Target/SystemZ/SystemZInstrInfo.cpp +++ b/lib/Target/SystemZ/SystemZInstrInfo.cpp @@ -966,6 +966,14 @@ SystemZInstrInfo::expandPostRAPseudo(MachineBasicBlock::iterator MI) const { expandRIPseudo(MI, SystemZ::AFI, SystemZ::AIH, false); return true; + case SystemZ::CFIMux: + expandRIPseudo(MI, SystemZ::CFI, SystemZ::CIH, false); + return true; + + case SystemZ::CLFIMux: + expandRIPseudo(MI, SystemZ::CLFI, SystemZ::CLIH, false); + return true; + case SystemZ::RISBMux: { bool DestIsHigh = isHighReg(MI->getOperand(0).getReg()); bool SrcIsHigh = isHighReg(MI->getOperand(2).getReg()); diff --git a/lib/Target/SystemZ/SystemZInstrInfo.td b/lib/Target/SystemZ/SystemZInstrInfo.td index 986e77f..f7dbd09 100644 --- a/lib/Target/SystemZ/SystemZInstrInfo.td +++ b/lib/Target/SystemZ/SystemZInstrInfo.td @@ -1076,8 +1076,13 @@ let Defs = [CC], CCValues = 0xE in { def CHI : CompareRI<"chi", 0xA7E, z_scmp, GR32, imm32sx16>; def CGHI : CompareRI<"cghi", 0xA7F, z_scmp, GR64, imm64sx16>; - // Comparison with a signed 32-bit immediate. + // Comparison with a signed 32-bit immediate. CFIMux expands to CFI or CIH, + // depending on the choice of register. + def CFIMux : CompareRIPseudo<z_scmp, GRX32, simm32>, + Requires<[FeatureHighWord]>; def CFI : CompareRIL<"cfi", 0xC2D, z_scmp, GR32, simm32>; + def CIH : CompareRIL<"cih", 0xCCD, z_scmp, GRH32, simm32>, + Requires<[FeatureHighWord]>; def CGFI : CompareRIL<"cgfi", 0xC2C, z_scmp, GR64, imm64sx32>; // Comparison with memory. @@ -1106,8 +1111,13 @@ let Defs = [CC], CCValues = 0xE, IsLogical = 1 in { def CLGFR : CompareRRE<"clgf", 0xB931, null_frag, GR64, GR32>; def CLGR : CompareRRE<"clg", 0xB921, z_ucmp, GR64, GR64>; - // Comparison with a signed 32-bit immediate. + // Comparison with an unsigned 32-bit immediate. CLFIMux expands to CLFI + // or CLIH, depending on the choice of register. + def CLFIMux : CompareRIPseudo<z_ucmp, GRX32, uimm32>, + Requires<[FeatureHighWord]>; def CLFI : CompareRIL<"clfi", 0xC2F, z_ucmp, GR32, uimm32>; + def CLIH : CompareRIL<"clih", 0xCCF, z_ucmp, GR32, uimm32>, + Requires<[FeatureHighWord]>; def CLGFI : CompareRIL<"clgfi", 0xC2E, z_ucmp, GR64, imm64zx32>; // Comparison with memory. |