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
diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp
index 9b81fe7..6a74883 100644
--- a/lib/Support/APInt.cpp
+++ b/lib/Support/APInt.cpp
@@ -1135,7 +1135,7 @@
// 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 0000000..bb285a2
--- /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;
+}