1 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s 2 3 ; When the extractelement is converted to a load the store can be re-used. 4 ; This will, however, introduce a cycle into the selection DAG (the load 5 ; of the extractelement index is dependent on the store, and so after the 6 ; conversion it becomes dependent on the new load, which is dependent on 7 ; the index). Make sure we skip the store, and conservatively instead 8 ; use a store to the stack. 9 10 define float @foo(i32* %i, <4 x float>* %v) { 11 ; CHECK-LABEL: foo: 12 ; CHECK: movaps %xmm0, -[[OFFSET:[0-9]+]](%rsp) 13 ; CHECK: movss -[[OFFSET]](%rsp,{{.*}}), %xmm0 {{.*}} 14 ; CHECK-NEXT: retq 15 %1 = load <4 x float>, <4 x float>* %v, align 16 16 %mul = fmul <4 x float> %1, %1 17 store <4 x float> %mul, <4 x float>* %v, align 16 18 %2 = load i32, i32* %i, align 4 19 %vecext = extractelement <4 x float> %mul, i32 %2 20 ret float %vecext 21 } 22
