Changes in directory llvm/lib/Target/PowerPC:
PPCInstrInfo.cpp updated: 1.27 -> 1.28
---
Log message:
Implement support for branch reversal, fix a bug in branch analysis.
This provides stuff like:
cmpw cr0, r15, r29
mr r14, r15
- bge cr0, LBB3_111 ;bb656
- b LBB3_90 ;bb501
+ blt cr0, LBB3_90 ;bb501
LBB3_111: ;bb656
lwz r18, 68(r1)
which is particularly good for dispatch group formation.
---
Diffs of the changes: (+5 -2)
PPCInstrInfo.cpp | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
Index: llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
diff -u llvm/lib/Target/PowerPC/PPCInstrInfo.cpp:1.27
llvm/lib/Target/PowerPC/PPCInstrInfo.cpp:1.28
--- llvm/lib/Target/PowerPC/PPCInstrInfo.cpp:1.27 Sat Oct 21 00:42:09 2006
+++ llvm/lib/Target/PowerPC/PPCInstrInfo.cpp Sat Oct 21 01:03:11 2006
@@ -186,7 +186,7 @@
TBB = LastInst->getOperand(2).getMachineBasicBlock();
Cond.push_back(LastInst->getOperand(0));
Cond.push_back(LastInst->getOperand(1));
- return true;
+ return false;
}
// Otherwise, don't know what this is.
return true;
@@ -261,5 +261,8 @@
bool PPCInstrInfo::
ReverseBranchCondition(std::vector<MachineOperand> &Cond) const {
- return true;
+ assert(Cond.size() == 2 && "Invalid PPC branch opcode!");
+ // Leave the CR# the same, but invert the condition.
+ Cond[1].setImm(invertPPCBranchOpcode(Cond[1].getImm()));
+ return false;
}
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