Changes in directory llvm/lib/Target/ARM:
ARMInstrInfo.cpp updated: 1.36 -> 1.37
ARMInstrInfo.h updated: 1.13 -> 1.14
---
Log message:
Instructions with unique labels or embedded jumptables cannot be duplicated
during ifcvt.
---
Diffs of the changes: (+31 -0)
ARMInstrInfo.cpp | 29 +++++++++++++++++++++++++++++
ARMInstrInfo.h | 2 ++
2 files changed, 31 insertions(+)
Index: llvm/lib/Target/ARM/ARMInstrInfo.cpp
diff -u llvm/lib/Target/ARM/ARMInstrInfo.cpp:1.36
llvm/lib/Target/ARM/ARMInstrInfo.cpp:1.37
--- llvm/lib/Target/ARM/ARMInstrInfo.cpp:1.36 Wed Jun 13 12:59:52 2007
+++ llvm/lib/Target/ARM/ARMInstrInfo.cpp Fri Jun 15 16:15:00 2007
@@ -446,6 +446,35 @@
return PIdx != -1 && MI->getOperand(PIdx).getImmedValue() != ARMCC::AL;
}
+bool ARMInstrInfo::CanBeDuplicated(const MachineInstr *MI) const {
+ switch (MI->getOpcode()) {
+ default: return true;
+ // These have unique labels.
+ case ARM::PICADD:
+ case ARM::PICLD:
+ case ARM::PICLDZH:
+ case ARM::PICLDZB:
+ case ARM::PICLDH:
+ case ARM::PICLDB:
+ case ARM::PICLDSH:
+ case ARM::PICLDSB:
+ case ARM::PICSTR:
+ case ARM::PICSTRH:
+ case ARM::PICSTRB:
+ case ARM::LEApcrel:
+ case ARM::LEApcrelJT:
+ case ARM::tPICADD:
+ case ARM::tLEApcrel:
+ case ARM::tLEApcrelJT:
+ case ARM::CONSTPOOL_ENTRY:
+ // These embed jumptables.
+ case ARM::BR_JTr:
+ case ARM::BR_JTm:
+ case ARM::BR_JTadd:
+ return false;
+ }
+}
+
bool ARMInstrInfo::PredicateInstruction(MachineInstr *MI,
const std::vector<MachineOperand> &Pred) const
{
unsigned Opc = MI->getOpcode();
Index: llvm/lib/Target/ARM/ARMInstrInfo.h
diff -u llvm/lib/Target/ARM/ARMInstrInfo.h:1.13
llvm/lib/Target/ARM/ARMInstrInfo.h:1.14
--- llvm/lib/Target/ARM/ARMInstrInfo.h:1.13 Tue May 29 13:42:18 2007
+++ llvm/lib/Target/ARM/ARMInstrInfo.h Fri Jun 15 16:15:00 2007
@@ -106,6 +106,8 @@
// Predication support.
virtual bool isPredicated(const MachineInstr *MI) const;
+ virtual bool CanBeDuplicated(const MachineInstr *MI) const;
+
virtual
bool PredicateInstruction(MachineInstr *MI,
const std::vector<MachineOperand> &Pred) const;
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