1 ; RUN: llc < %s -mtriple=x86_64-unknown -mattr=sse4.1 -o /dev/null
3 ; Testcase for PR31593.
4 ; Revision r291120 introduced a regression and this test started failing
5 ; because of a 'fatal error in the backend':
6 ; Cannot select: t14: v2i64 = zero_extend_vector_inreg t18
7 ; t18: v4i32 = bitcast t17
8 ; t17: v2i64,ch = load<LD16[%0](dereferenceable)> t0, FrameIndex:i64<1>, undef:i64
9 ; t1: i64 = FrameIndex<1>
11 ; In function: _Z3foov
12 ; This regression was fixed in r291535.
14 %struct.S = type { <2 x i64> }
16 declare <4 x i32> @llvm.x86.sse2.pslli.d(<4 x i32>, i32)
17 define void @_Z3foov() local_unnamed_addr #2 {
19 %zero = alloca %struct.S, align 16
20 %e = alloca %struct.S, align 16
21 %s = alloca %struct.S, align 16
22 %0 = load <4 x i32>, ptr %e, align 16
23 %vecext.i = extractelement <4 x i32> %0, i32 0
24 %1 = call <4 x i32> @llvm.x86.sse2.pslli.d(<4 x i32> undef, i32 %vecext.i)
25 store <4 x i32> %1, ptr %s, align 16
28 attributes #2 = { "target-features"="+sse4.1" }