AMDGPU: Fix fneg combine test not checking full result

This wasn't accounting for the canonicalize of the input, or checking
the output fneg isn't folded as intended. Avoids test failure in
unrelated patch which happens to change register numberings.

diff --git a/llvm/test/CodeGen/AMDGPU/fneg-combines.ll b/llvm/test/CodeGen/AMDGPU/fneg-combines.ll
index 7ca22b5..24a6d72 100644 (file)
--- a/llvm/test/CodeGen/AMDGPU/fneg-combines.ll
+++ b/llvm/test/CodeGen/AMDGPU/fneg-combines.ll
@@ -563,7 +563,9 @@ define amdgpu_ps float @v_fneg_negk_minnum_f32_no_ieee(float %a) #0 {
 
 ; GCN-LABEL: {{^}}v_fneg_0_minnum_f32:
 ; GCN: {{buffer|flat}}_load_dword [[A:v[0-9]+]]
-; GCN: v_min_f32_e32 [[RESULT:v[0-9]+]], 0, [[A]]
+; GCN-NOT [[A]]
+; GCN: v_min_f32_e32 [[MIN:v[0-9]+]], 0, [[A]]
+; GCN: v_xor_b32_e32 [[RESULT:v[0-9]+]], 0x80000000, [[MIN]]
 ; GCN: flat_store_dword v{{\[[0-9]+:[0-9]+\]}}, [[RESULT]]
 define amdgpu_kernel void @v_fneg_0_minnum_f32(float addrspace(1)* %out, float addrspace(1)* %a.ptr) #0 {
   %tid = call i32 @llvm.amdgcn.workitem.id.x()
@@ -571,7 +573,7 @@ define amdgpu_kernel void @v_fneg_0_minnum_f32(float addrspace(1)* %out, float a
   %a.gep = getelementptr inbounds float, float addrspace(1)* %a.ptr, i64 %tid.ext
   %out.gep = getelementptr inbounds float, float addrspace(1)* %out, i64 %tid.ext
   %a = load volatile float, float addrspace(1)* %a.gep
-  %min = call float @llvm.minnum.f32(float 0.0, float %a)
+  %min = call nnan float @llvm.minnum.f32(float 0.0, float %a)
   %fneg = fneg float %min
   store float %fneg, float addrspace(1)* %out.gep
   ret void
@@ -970,7 +972,9 @@ define amdgpu_ps float @v_fneg_negk_maxnum_f32_no_ieee(float %a) #0 {
 
 ; GCN-LABEL: {{^}}v_fneg_0_maxnum_f32:
 ; GCN: {{buffer|flat}}_load_dword [[A:v[0-9]+]]
-; GCN: v_max_f32_e32 [[RESULT:v[0-9]+]], 0, [[A]]
+; GCN-NOT: [[A]]
+; GCN: v_max_f32_e32 [[MAX:v[0-9]+]], 0, [[A]]
+; GCN: v_xor_b32_e32 [[RESULT:v[0-9]+]], 0x80000000, [[MAX]]
 ; GCN: flat_store_dword v{{\[[0-9]+:[0-9]+\]}}, [[RESULT]]
 define amdgpu_kernel void @v_fneg_0_maxnum_f32(float addrspace(1)* %out, float addrspace(1)* %a.ptr) #0 {
   %tid = call i32 @llvm.amdgcn.workitem.id.x()
@@ -978,7 +982,7 @@ define amdgpu_kernel void @v_fneg_0_maxnum_f32(float addrspace(1)* %out, float a
   %a.gep = getelementptr inbounds float, float addrspace(1)* %a.ptr, i64 %tid.ext
   %out.gep = getelementptr inbounds float, float addrspace(1)* %out, i64 %tid.ext
   %a = load volatile float, float addrspace(1)* %a.gep
-  %max = call float @llvm.maxnum.f32(float 0.0, float %a)
+  %max = call nnan float @llvm.maxnum.f32(float 0.0, float %a)
   %fneg = fneg float %max
   store float %fneg, float addrspace(1)* %out.gep
   ret void