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| author | Pawel Wodnicki <pawel@32bitmicro.com> | 2012-12-04 18:29:45 +0000 |
|---|---|---|
| committer | Pawel Wodnicki <pawel@32bitmicro.com> | 2012-12-04 18:29:45 +0000 |
| commit | a9020249400f65612fc9f1c0f5cfebe50a58ff85 (patch) | |
| tree | 2be2e6b0e25a36998f84362eb2314aa1cbf07587 | |
| parent | 24d616e51f503d77fe9dca5904991292831b9132 (diff) | |
| download | llvm-a9020249400f65612fc9f1c0f5cfebe50a58ff85.tar.gz llvm-a9020249400f65612fc9f1c0f5cfebe50a58ff85.tar.bz2 llvm-a9020249400f65612fc9f1c0f5cfebe50a58ff85.tar.xz | |
Merging r169084: into 3.2 release branch.
SROA: Avoid struct and array types early to avoid creating an overly large integer type.
Fixes PR14465.
Differential Revision: http://llvm-reviews.chandlerc.com/D148
git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_32@169290 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Transforms/Scalar/SROA.cpp | 3 | ||||
| -rw-r--r-- | test/Transforms/SROA/basictest.ll | 13 |
2 files changed, 16 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/SROA.cpp b/lib/Transforms/Scalar/SROA.cpp index ccc2f7a77b..062ec05342 100644 --- a/lib/Transforms/Scalar/SROA.cpp +++ b/lib/Transforms/Scalar/SROA.cpp @@ -2160,6 +2160,9 @@ static bool isIntegerWideningViable(const DataLayout &TD, AllocaPartitioning::const_use_iterator I, AllocaPartitioning::const_use_iterator E) { uint64_t SizeInBits = TD.getTypeSizeInBits(AllocaTy); + // Don't create integer types larger than the maximum bitwidth. + if (SizeInBits > IntegerType::MAX_INT_BITS) + return false; // Don't try to handle allocas with bit-padding. if (SizeInBits != TD.getTypeStoreSizeInBits(AllocaTy)) diff --git a/test/Transforms/SROA/basictest.ll b/test/Transforms/SROA/basictest.ll index b363eefb3f..a291c39b33 100644 --- a/test/Transforms/SROA/basictest.ll +++ b/test/Transforms/SROA/basictest.ll @@ -1134,3 +1134,16 @@ entry: ret void ; CHECK: ret } + +define void @PR14465() { +; Ensure that we don't crash when analyzing a alloca larger than the maximum +; integer type width (MAX_INT_BITS) supported by llvm (1048576*32 > (1<<23)-1). +; CHECK: @PR14465 + + %stack = alloca [1048576 x i32], align 16 +; CHECK: alloca [1048576 x i32] + %cast = bitcast [1048576 x i32]* %stack to i8* + call void @llvm.memset.p0i8.i64(i8* %cast, i8 -2, i64 4194304, i32 16, i1 false) + ret void +; CHECK: ret +} |