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| author | Michael Liao <michael.liao@intel.com> | 2012-08-15 03:49:59 +0000 |
|---|---|---|
| committer | Michael Liao <michael.liao@intel.com> | 2012-08-15 03:49:59 +0000 |
| commit | 9441ad0b6e02ee9558168b37a9620ef1afe79388 (patch) | |
| tree | fbaeed21458e9ea5457b1d41d2aceadc56c82e76 /test | |
| parent | c2de3ddb23e45859f8b4ffdc21f796dc39703280 (diff) | |
| download | external_llvm-9441ad0b6e02ee9558168b37a9620ef1afe79388.zip external_llvm-9441ad0b6e02ee9558168b37a9620ef1afe79388.tar.gz external_llvm-9441ad0b6e02ee9558168b37a9620ef1afe79388.tar.bz2 | |
fix infinite loop in instcombine with more than 4GB memcpy
- memcpy size is wrongly truncated into 32-bit and treat 8GB memcpy is
0-sized memcpy
- as 0-sized memcpy/memset is already removed before SimplifyMemTransfer
and SimplifyMemSet in visitCallInst, replace 0 checking with
assertions.
- replace getZExtValue() with getLimitedValue() according to
Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161923 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/InstCombine/memcpy.ll | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/memcpy.ll b/test/Transforms/InstCombine/memcpy.ll index 8a2e3aa..3a68ff9 100644 --- a/test/Transforms/InstCombine/memcpy.ll +++ b/test/Transforms/InstCombine/memcpy.ll @@ -1,6 +1,7 @@ ; RUN: opt < %s -instcombine -S | FileCheck %s declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind +declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind define void @test1(i8* %a) { tail call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %a, i32 100, i32 1, i1 false) @@ -17,3 +18,10 @@ define void @test2(i8* %a) { ; CHECK: define void @test2 ; CHECK-NEXT: call void @llvm.memcpy } + +define void @test3(i8* %d, i8* %s) { + tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %d, i8* %s, i64 17179869184, i32 4, i1 false) + ret void +; CHECK: define void @test3 +; CHECK-NEXT: call void @llvm.memcpy +} |