[PATCH] D38127: [X86] Adding a testpoint for fast-math flags propagation.
Jatin Bhateja via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu Sep 21 02:55:11 PDT 2017
This revision was automatically updated to reflect the committed changes.
Closed by commit rL313869: [X86] Adding a testpoint for fast-math flags propagation. (authored by jbhateja).
Repository:
rL LLVM
https://reviews.llvm.org/D38127
Files:
llvm/trunk/test/CodeGen/X86/fmf-flags.ll
Index: llvm/trunk/test/CodeGen/X86/fmf-flags.ll
===================================================================
--- llvm/trunk/test/CodeGen/X86/fmf-flags.ll
+++ llvm/trunk/test/CodeGen/X86/fmf-flags.ll
@@ -0,0 +1,47 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=x86_64-unknown | FileCheck %s -check-prefix=X64
+; RUN: llc < %s -mtriple=i686-unknown | FileCheck %s -check-prefix=X86
+
+declare float @llvm.sqrt.f32(float %x);
+
+define float @fast_recip_sqrt(float %x) {
+; X64-LABEL: fast_recip_sqrt:
+; X64: # BB#0:
+; X64-NEXT: sqrtss %xmm0, %xmm1
+; X64-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
+; X64-NEXT: divss %xmm1, %xmm0
+; X64-NEXT: retq
+;
+; X86-LABEL: fast_recip_sqrt:
+; X86: # BB#0:
+; X86-NEXT: flds {{[0-9]+}}(%esp)
+; X86-NEXT: fsqrt
+; X86-NEXT: fld1
+; X86-NEXT: fdivp %st(1)
+; X86-NEXT: retl
+ %y = call fast float @llvm.sqrt.f32(float %x)
+ %z = fdiv fast float 1.0, %y
+ ret float %z
+}
+
+declare float @llvm.fmuladd.f32(float %a, float %b, float %c);
+
+define float @fast_fmuladd_opts(float %a , float %b , float %c) {
+; X64-LABEL: fast_fmuladd_opts:
+; X64: # BB#0:
+; X64-NEXT: movaps %xmm0, %xmm1
+; X64-NEXT: addss %xmm1, %xmm1
+; X64-NEXT: addss %xmm0, %xmm1
+; X64-NEXT: movaps %xmm1, %xmm0
+; X64-NEXT: retq
+;
+; X86-LABEL: fast_fmuladd_opts:
+; X86: # BB#0:
+; X86-NEXT: flds {{[0-9]+}}(%esp)
+; X86-NEXT: fld %st(0)
+; X86-NEXT: fadd %st(1)
+; X86-NEXT: faddp %st(1)
+; X86-NEXT: retl
+ %res = call fast float @llvm.fmuladd.f32(float %a, float 2.0, float %a)
+ ret float %res
+}
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