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| author | Evan Cheng <evan.cheng@apple.com> | 2011-01-20 23:55:07 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2011-01-20 23:55:07 +0000 |
| commit | d7e3cc840b81b0438e47f05d9664137a198876df (patch) | |
| tree | e43d687614462ad01654f0ef2013aa9c2bc9938f /lib/Target/ARM | |
| parent | e906921480beacea2dea2d5ce8156bc246ee12a7 (diff) | |
| download | external_llvm-d7e3cc840b81b0438e47f05d9664137a198876df.zip external_llvm-d7e3cc840b81b0438e47f05d9664137a198876df.tar.gz external_llvm-d7e3cc840b81b0438e47f05d9664137a198876df.tar.bz2 | |
Don't be overly aggressive with CSE of "ldr constantpool". If it's a pc-relative
value, the "add pc" must be CSE'ed at the same time. We could follow the same
approach as T2 by adding pseudo instructions that combine the ldr + "add pc".
But the better approach is to use movw + movt (which I will enable soon), so
I'll leave this as a TODO.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123949 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/ARM')
| -rw-r--r-- | lib/Target/ARM/ARMBaseInstrInfo.cpp | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/lib/Target/ARM/ARMBaseInstrInfo.cpp b/lib/Target/ARM/ARMBaseInstrInfo.cpp index ef7458d..aaf4f0d 100644 --- a/lib/Target/ARM/ARMBaseInstrInfo.cpp +++ b/lib/Target/ARM/ARMBaseInstrInfo.cpp @@ -1055,8 +1055,7 @@ bool ARMBaseInstrInfo::produceSameValue(const MachineInstr *MI0, const MachineInstr *MI1, const MachineRegisterInfo *MRI) const { int Opcode = MI0->getOpcode(); - if (Opcode == ARM::LDRi12 || - Opcode == ARM::t2LDRpci || + if (Opcode == ARM::t2LDRpci || Opcode == ARM::t2LDRpci_pic || Opcode == ARM::tLDRpci || Opcode == ARM::tLDRpci_pic || @@ -1069,9 +1068,6 @@ bool ARMBaseInstrInfo::produceSameValue(const MachineInstr *MI0, const MachineOperand &MO0 = MI0->getOperand(1); const MachineOperand &MO1 = MI1->getOperand(1); - if (Opcode == ARM::LDRi12 && (!MO0.isCPI() || !MO1.isCPI())) - return false; - if (MO0.getOffset() != MO1.getOffset()) return false; |