From 28dd960cd1c346c5beef4585d6ea68ae31be0faf Mon Sep 17 00:00:00 2001 From: Chad Rosier Date: Fri, 8 Jun 2012 18:04:52 +0000 Subject: [PATCH] Fix a crash in APInt::lshr when shiftAmt > BitWidth. Patch by James Benton . git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158213 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Support/APInt.cpp | 2 +- test/CodeGen/Generic/2012-06-08-APIntCrash.ll | 8 ++++++++ 2 files changed, 9 insertions(+), 1 deletion(-) create mode 100644 test/CodeGen/Generic/2012-06-08-APIntCrash.ll diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp index 9b81fe776a6..6a74883803c 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 00000000000..bb285a20734 --- /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, + ret <8 x i32> %2; +} -- 2.34.1