diff options
Diffstat (limited to 'test/CodeGen/X86/vbinop-simplify-bug.ll')
| -rw-r--r-- | test/CodeGen/X86/vbinop-simplify-bug.ll | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/test/CodeGen/X86/vbinop-simplify-bug.ll b/test/CodeGen/X86/vbinop-simplify-bug.ll new file mode 100644 index 0000000..3a89cd7 --- /dev/null +++ b/test/CodeGen/X86/vbinop-simplify-bug.ll @@ -0,0 +1,23 @@ +; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mattr=sse2 -mcpu=corei7 -o /dev/null + +; Revision 199135 introduced a wrong check in method +; DAGCombiner::SimplifyVBinOp in an attempt to refactor some code +; using the new method 'BuildVectorSDNode::isConstant' when possible. +; +; However the modified code in method SimplifyVBinOp now wrongly +; checks that the operands of a vector bin-op are both constants. +; +; With that wrong change, this test started failing because of a +; 'fatal error in the backend': +; Cannot select: 0x2e329d0: v4i32 = BUILD_VECTOR 0x2e2ea00, 0x2e2ea00, 0x2e2ea00, 0x2e2ea00 +; 0x2e2ea00: i32 = Constant<1> [ID=4] +; 0x2e2ea00: i32 = Constant<1> [ID=4] +; 0x2e2ea00: i32 = Constant<1> [ID=4] +; 0x2e2ea00: i32 = Constant<1> [ID=4] + +define <8 x i32> @reduced_test_case() { + %Shuff = shufflevector <8 x i32> zeroinitializer, <8 x i32> zeroinitializer, <8 x i32> <i32 1, i32 3, i32 undef, i32 7, i32 9, i32 11, i32 13, i32 15> + %B23 = sub <8 x i32> %Shuff, <i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1, i32 -1> + ret <8 x i32> %B23 +} + |