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author | Chris Lattner <sabre@nondot.org> | 2006-12-22 23:14:42 +0000 |
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committer | Chris Lattner <sabre@nondot.org> | 2006-12-22 23:14:42 +0000 |
commit | add2bd7f5941537a97a41e037ae2277fbeed0b4f (patch) | |
tree | 207463d658f79a22709cab7ae0441c73ab6a87e1 /lib | |
parent | 29ee5c1ba4343a250da30166844d3563041298c0 (diff) | |
download | llvm-add2bd7f5941537a97a41e037ae2277fbeed0b4f.tar.gz llvm-add2bd7f5941537a97a41e037ae2277fbeed0b4f.tar.bz2 llvm-add2bd7f5941537a97a41e037ae2277fbeed0b4f.tar.xz |
add a simple fast-path for dead allocas
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32750 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
-rw-r--r-- | lib/Transforms/Scalar/ScalarReplAggregates.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/ScalarReplAggregates.cpp b/lib/Transforms/Scalar/ScalarReplAggregates.cpp index 160128eba1..a92592b816 100644 --- a/lib/Transforms/Scalar/ScalarReplAggregates.cpp +++ b/lib/Transforms/Scalar/ScalarReplAggregates.cpp @@ -139,6 +139,13 @@ bool SROA::performScalarRepl(Function &F) { 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 @@ bool SROA::performScalarRepl(Function &F) { } // Finally, delete the Alloca instruction - AI->getParent()->getInstList().erase(AI); + AI->eraseFromParent(); NumReplaced++; } |