diff --git a/llvm/test/CodeGen/X86/fmf-reduction.ll b/llvm/test/CodeGen/X86/fmf-reduction.ll new file mode 100644 index 0000000000000..e959ef8fdba86 --- /dev/null +++ b/llvm/test/CodeGen/X86/fmf-reduction.ll @@ -0,0 +1,27 @@ +; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py +; RUN: llc < %s -mtriple=x86_64-- -mattr=fma | FileCheck %s + +; FIXME: Propagation of IR FMF should not drop flags when adding the DAG reduction flag. +; This should include an FMA instruction, not separate FMUL/FADD. + +define double @julia_dotf(<4 x double> %x, <4 x double> %y, <4 x double> %z, i1 %t3) { +; CHECK-LABEL: julia_dotf: +; CHECK: # %bb.0: +; CHECK-NEXT: vmulpd %ymm1, %ymm0, %ymm0 +; CHECK-NEXT: vaddpd %ymm0, %ymm2, %ymm0 +; CHECK-NEXT: vextractf128 $1, %ymm0, %xmm1 +; CHECK-NEXT: vaddpd %xmm1, %xmm0, %xmm0 +; CHECK-NEXT: vpermilpd {{.*#+}} xmm1 = xmm0[1,0] +; CHECK-NEXT: vaddsd %xmm1, %xmm0, %xmm0 +; CHECK-NEXT: vzeroupper +; CHECK-NEXT: retq + %t1 = fmul contract <4 x double> %x, %y + %t2 = fadd fast <4 x double> %z, %t1 + %rdx.shuf = shufflevector <4 x double> %t2, <4 x double> undef, <4 x i32> + %bin.rdx22 = fadd fast <4 x double> %t2, %rdx.shuf + %rdx.shuf23 = shufflevector <4 x double> %bin.rdx22, <4 x double> undef, <4 x i32> + %bin.rdx24 = fadd fast <4 x double> %bin.rdx22, %rdx.shuf23 + %t4 = extractelement <4 x double> %bin.rdx24, i32 0 + ret double %t4 +} +