diff options
| author | Chad Rosier <mcrosier@apple.com> | 2012-06-08 18:04:52 +0000 |
|---|---|---|
| committer | Chad Rosier <mcrosier@apple.com> | 2012-06-08 18:04:52 +0000 |
| commit | 28dd960cd1c346c5beef4585d6ea68ae31be0faf (patch) | |
| tree | 0186b83e858f8f1927c850aa1012ad707a9fbc03 | |
| parent | c36d033c08c6148846f61cc7aee4fe0f523af1e5 (diff) | |
Fix a crash in APInt::lshr when shiftAmt > BitWidth.
Patch by James Benton <jbenton@vmware.com>.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158213 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Support/APInt.cpp | 2 | ||||
| -rw-r--r-- | test/CodeGen/Generic/2012-06-08-APIntCrash.ll | 8 |
2 files changed, 9 insertions, 1 deletions
diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp index 9b81fe776a..6a74883803 100644 --- a/lib/Support/APInt.cpp +++ b/lib/Support/APInt.cpp @@ -1135,7 +1135,7 @@ APInt APInt::lshr(unsigned shiftAmt) const { // If all the bits were shifted out, the result is 0. This avoids issues // with shifting by the size of the integer type, which produces undefined // results. We define these "undefined results" to always be 0. - if (shiftAmt == BitWidth) + if (shiftAmt >= BitWidth) return APInt(BitWidth, 0); // If none of the bits are shifted out, the result is *this. This avoids diff --git a/test/CodeGen/Generic/2012-06-08-APIntCrash.ll b/test/CodeGen/Generic/2012-06-08-APIntCrash.ll new file mode 100644 index 0000000000..bb285a2073 --- /dev/null +++ b/test/CodeGen/Generic/2012-06-08-APIntCrash.ll @@ -0,0 +1,8 @@ +; RUN: llc < %s + +define <8 x i32> @test1(<8 x i32>* %ptr) +{ + %1 = load <8 x i32>* %ptr, align 32 + %2 = and <8 x i32> %1, <i32 0, i32 0, i32 0, i32 -1, i32 0, i32 0, i32 0, i32 -1> + ret <8 x i32> %2; +} |