Changes in directory llvm/lib/Target/ARM:
ARMInstrInfo.cpp updated: 1.35 -> 1.36
---
Log message:
Handle blocks with 2 unconditional branches in AnalyzeBranch.
---
Diffs of the changes: (+10 -0)
ARMInstrInfo.cpp | 10 ++++++++++
1 files changed, 10 insertions(+)
Index: llvm/lib/Target/ARM/ARMInstrInfo.cpp
diff -u llvm/lib/Target/ARM/ARMInstrInfo.cpp:1.35
llvm/lib/Target/ARM/ARMInstrInfo.cpp:1.36
--- llvm/lib/Target/ARM/ARMInstrInfo.cpp:1.35 Fri Jun 8 16:59:56 2007
+++ llvm/lib/Target/ARM/ARMInstrInfo.cpp Wed Jun 13 12:59:52 2007
@@ -345,6 +345,16 @@
return false;
}
+ // If the block ends with two B's or tB's, handle it. The second one is not
+ // executed, so remove it.
+ if ((SecondLastOpc == ARM::B || SecondLastOpc==ARM::tB) &&
+ (LastOpc == ARM::B || LastOpc == ARM::tB)) {
+ TBB = SecondLastInst->getOperand(0).getMachineBasicBlock();
+ I = LastInst;
+ I->eraseFromParent();
+ return false;
+ }
+
// Otherwise, can't handle this.
return true;
}
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