Changes in directory llvm/lib/Target/X86:
X86InstrInfo.cpp updated: 1.89 -> 1.90
X86InstrInfo.h updated: 1.64 -> 1.65
---
Log message:
Add a target hook to allow loads from constant pools to be rematerialized, and
an
implementation for x86.
---
Diffs of the changes: (+26 -0)
X86InstrInfo.cpp | 25 +++++++++++++++++++++++++
X86InstrInfo.h | 1 +
2 files changed, 26 insertions(+)
Index: llvm/lib/Target/X86/X86InstrInfo.cpp
diff -u llvm/lib/Target/X86/X86InstrInfo.cpp:1.89
llvm/lib/Target/X86/X86InstrInfo.cpp:1.90
--- llvm/lib/Target/X86/X86InstrInfo.cpp:1.89 Wed Jun 13 12:59:52 2007
+++ llvm/lib/Target/X86/X86InstrInfo.cpp Thu Jun 14 15:50:44 2007
@@ -112,6 +112,31 @@
}
+bool X86InstrInfo::isOtherReMaterializableLoad(MachineInstr *MI) const {
+ switch (MI->getOpcode()) {
+ default: break;
+ case X86::MOV8rm:
+ case X86::MOV16rm:
+ case X86::MOV16_rm:
+ case X86::MOV32rm:
+ case X86::MOV32_rm:
+ case X86::MOV64rm:
+ case X86::FpLD64m:
+ case X86::MOVSSrm:
+ case X86::MOVSDrm:
+ case X86::MOVAPSrm:
+ case X86::MOVAPDrm:
+ case X86::MMX_MOVD64rm:
+ case X86::MMX_MOVQ64rm:
+ return MI->getOperand(1).isRegister() && MI->getOperand(2).isImmediate() &&
+ MI->getOperand(3).isRegister() &&
MI->getOperand(4).isConstantPoolIndex() &&
+ MI->getOperand(1).getReg() == 0 &&
+ MI->getOperand(2).getImmedValue() == 1 &&
+ MI->getOperand(3).getReg() == 0;
+ }
+ return false;
+}
+
/// convertToThreeAddress - This method must be implemented by targets that
/// set the M_CONVERTIBLE_TO_3_ADDR flag. When this flag is set, the target
/// may be able to convert a two-address instruction into a true
Index: llvm/lib/Target/X86/X86InstrInfo.h
diff -u llvm/lib/Target/X86/X86InstrInfo.h:1.64
llvm/lib/Target/X86/X86InstrInfo.h:1.65
--- llvm/lib/Target/X86/X86InstrInfo.h:1.64 Thu May 17 19:17:09 2007
+++ llvm/lib/Target/X86/X86InstrInfo.h Thu Jun 14 15:50:44 2007
@@ -239,6 +239,7 @@
unsigned& destReg) const;
unsigned isLoadFromStackSlot(MachineInstr *MI, int &FrameIndex) const;
unsigned isStoreToStackSlot(MachineInstr *MI, int &FrameIndex) const;
+ bool isOtherReMaterializableLoad(MachineInstr *MI) const;
/// convertToThreeAddress - This method must be implemented by targets that
/// set the M_CONVERTIBLE_TO_3_ADDR flag. When this flag is set, the target
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