AMDGPU: Use rcp for fdiv 1, x with fpmath metadata
Using rcp should be OK for safe math usually, so this
should not be replacing the original fdiv.
llvm-svn: 276823
diff --git a/llvm/test/CodeGen/AMDGPU/amdgpu-codegenprepare.ll b/llvm/test/CodeGen/AMDGPU/amdgpu-codegenprepare.ll
index c9ae39d..d78c751 100644
--- a/llvm/test/CodeGen/AMDGPU/amdgpu-codegenprepare.ll
+++ b/llvm/test/CodeGen/AMDGPU/amdgpu-codegenprepare.ll
@@ -45,6 +45,7 @@
; CHECK-LABEL: @rcp_fdiv_fpmath(
; CHECK: %no.md = fdiv float 1.000000e+00, %x{{$}}
+; CHECK: %md.25ulp = fdiv float 1.000000e+00, %x, !fpmath !0
; CHECK: %md.half.ulp = fdiv float 1.000000e+00, %x, !fpmath !1
; CHECK: %arcp.no.md = fdiv arcp float 1.000000e+00, %x{{$}}
; CHECK: %arcp.25ulp = fdiv arcp float 1.000000e+00, %x, !fpmath !0
@@ -54,6 +55,9 @@
%no.md = fdiv float 1.0, %x
store volatile float %no.md, float addrspace(1)* %out
+ %md.25ulp = fdiv float 1.0, %x, !fpmath !0
+ store volatile float %md.25ulp, float addrspace(1)* %out
+
%md.half.ulp = fdiv float 1.0, %x, !fpmath !1
store volatile float %md.half.ulp, float addrspace(1)* %out
@@ -146,13 +150,13 @@
; CHECK: %[[X0:[0-9]+]] = extractelement <2 x float> %x, i64 0
; CHECK: fdiv arcp float 1.000000e+00, %[[X0]], !fpmath !0
; CHECK: %[[X1:[0-9]+]] = extractelement <2 x float> %x, i64 1
-; CHECK: call arcp float @llvm.amdgcn.fdiv.fast(float 2.000000e+00, float %[[X1]]), !fpmath !0
+; CHECK: fdiv arcp float 2.000000e+00, %[[X1]], !fpmath !0
; CHECK: store volatile <2 x float> %arcp.25ulp
; CHECK: %[[X0:[0-9]+]] = extractelement <2 x float> %x, i64 0
; CHECK: fdiv fast float 1.000000e+00, %[[X0]], !fpmath !0
; CHECK: %[[X1:[0-9]+]] = extractelement <2 x float> %x, i64 1
-; CHECK: call fast float @llvm.amdgcn.fdiv.fast(float 2.000000e+00, float %[[X1]]), !fpmath !0
+; CHECK: fdiv fast float 2.000000e+00, %[[X1]], !fpmath !0
; CHECK: store volatile <2 x float> %fast.25ulp
define void @rcp_fdiv_fpmath_vector_nonsplat(<2 x float> addrspace(1)* %out, <2 x float> %x) #1 {
%no.md = fdiv <2 x float> <float 1.0, float 2.0>, %x