Changes in directory llvm/lib/Transforms/Scalar:
ScalarReplAggregates.cpp updated: 1.59 -> 1.60
---
Log message:
add a simple fast-path for dead allocas
---
Diffs of the changes: (+8 -1)
ScalarReplAggregates.cpp | 9 ++++++++-
1 files changed, 8 insertions(+), 1 deletion(-)
Index: llvm/lib/Transforms/Scalar/ScalarReplAggregates.cpp
diff -u llvm/lib/Transforms/Scalar/ScalarReplAggregates.cpp:1.59
llvm/lib/Transforms/Scalar/ScalarReplAggregates.cpp:1.60
--- llvm/lib/Transforms/Scalar/ScalarReplAggregates.cpp:1.59 Tue Dec 19
15:40:18 2006
+++ llvm/lib/Transforms/Scalar/ScalarReplAggregates.cpp Fri Dec 22 17:14:42 2006
@@ -139,6 +139,13 @@
AllocationInst *AI = WorkList.back();
WorkList.pop_back();
+ // Handle dead allocas trivially. These can be formed by SROA'ing arrays
+ // with unused elements.
+ if (AI->use_empty()) {
+ AI->eraseFromParent();
+ continue;
+ }
+
// If we can turn this aggregate value (potentially with casts) into a
// simple scalar value that can be mem2reg'd into a register value.
bool IsNotTrivial = false;
@@ -232,7 +239,7 @@
}
// Finally, delete the Alloca instruction
- AI->getParent()->getInstList().erase(AI);
+ AI->eraseFromParent();
NumReplaced++;
}
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