Changes in directory llvm/lib/VMCore:
Constants.cpp updated: 1.185 -> 1.186
---
Log message:
Don't create usless casts for same-bith-width floating point casts.
---
Diffs of the changes: (+3 -2)
Constants.cpp | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
Index: llvm/lib/VMCore/Constants.cpp
diff -u llvm/lib/VMCore/Constants.cpp:1.185 llvm/lib/VMCore/Constants.cpp:1.186
--- llvm/lib/VMCore/Constants.cpp:1.185 Mon Dec 11 18:51:07 2006
+++ llvm/lib/VMCore/Constants.cpp Mon Dec 11 23:38:50 2006
@@ -1531,9 +1531,10 @@
"Invalid cast");
unsigned SrcBits = C->getType()->getPrimitiveSizeInBits();
unsigned DstBits = Ty->getPrimitiveSizeInBits();
+ if (SrcBits == DstBits)
+ return C; // Avoid a useless cast
Instruction::CastOps opcode =
- (SrcBits == DstBits ? Instruction::BitCast :
- (SrcBits > DstBits ? Instruction::FPTrunc : Instruction::FPExt));
+ (SrcBits > DstBits ? Instruction::FPTrunc : Instruction::FPExt);
return getCast(opcode, C, Ty);
}
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