[NFC] adding initial intersect test for Node to Instruction association

llvm-svn: 341138

llvm/test/CodeGen/X86/intersect-fma-fmf.ll

@@ -0,0 +1,14 @@
+; RUN: llc -mtriple=i686-unknown-unknown -mattr=+avx512f < %s | FileCheck %s
+
+define float @test_x86_fma_intersection_fmf(float %a, float %b) {
+; CHECK-LABEL: test_x86_fma_intersection_fmf:
+; CHECK:      # %bb.0:
+; CHECK:        vmulss {{[0-9]+}}(%esp), %xmm0, %xmm1
+; CHECK-NEXT:   vaddss %xmm0, %xmm1, %xmm0
+; CHECK:        retl 
+     %tmp8 = fmul fast float %a, %b
+     %tmp9 = fadd fast float %tmp8, %b
+     %tmp10 = insertelement <4 x float> undef, float  %tmp9, i32 1
+     %tmp11 = extractelement <4 x float> %tmp10, i32 1
+     ret float %tmp11
+}