| ; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s |
| |
| ; Make sure (fmul (fadd x, x), c) -> (fmul x, (fmul 2.0, c)) doesn't |
| ; make add an instruction if the fadd has more than one use. |
| |
| declare float @llvm.fabs.f32(float) #1 |
| |
| ; GCN-LABEL: {{^}}multiple_fadd_use_test: |
| ; GCN: v_max_legacy_f32_e64 [[A16:v[0-9]+]], |
| ; GCN: v_add_f32_e32 [[A17:v[0-9]+]], [[A16]], [[A16]] |
| ; GCN: v_mul_f32_e32 [[A18:v[0-9]+]], [[A17]], [[A17]] |
| ; GCN: v_mad_f32 [[A20:v[0-9]+]], -[[A18]], [[A17]], 1.0 |
| ; GCN: buffer_store_dword [[A20]] |
| define void @multiple_fadd_use_test(float addrspace(1)* %out, float %x, float %y, float %z) #0 { |
| %a11 = fadd fast float %y, -1.0 |
| %a12 = call float @llvm.fabs.f32(float %a11) |
| %a13 = fadd fast float %x, -1.0 |
| %a14 = call float @llvm.fabs.f32(float %a13) |
| %a15 = fcmp ogt float %a12, %a14 |
| %a16 = select i1 %a15, float %a12, float %a14 |
| %a17 = fmul fast float %a16, 2.0 |
| %a18 = fmul fast float %a17, %a17 |
| %a19 = fmul fast float %a18, %a17 |
| %a20 = fsub fast float 1.0, %a19 |
| store float %a20, float addrspace(1)* %out |
| ret void |
| } |
| |
| ; GCN-LABEL: {{^}}multiple_use_fadd_fmac |
| ; GCN-DAG: v_add_f32_e64 [[MUL2:v[0-9]+]], [[X:s[0-9]+]], s{{[0-9]+}} |
| ; GCN-DAG: v_mac_f32_e64 [[MAD:v[0-9]+]], 2.0, [[X]] |
| ; GCN-DAG: buffer_store_dword [[MUL2]] |
| ; GCN-DAG: buffer_store_dword [[MAD]] |
| ; GCN: s_endpgm |
| define void @multiple_use_fadd_fmac(float addrspace(1)* %out, float %x, float %y) #0 { |
| %out.gep.1 = getelementptr float, float addrspace(1)* %out, i32 1 |
| %mul2 = fmul fast float %x, 2.0 |
| %mad = fadd fast float %mul2, %y |
| store float %mul2, float addrspace(1)* %out |
| store float %mad, float addrspace(1)* %out.gep.1 |
| ret void |
| } |
| |
| ; GCN-LABEL: {{^}}multiple_use_fadd_fmad: |
| ; GCN-DAG: v_add_f32_e64 [[MUL2:v[0-9]+]], |[[X:s[0-9]+]]|, |s{{[0-9]+}}| |
| ; GCN-DAG: v_mad_f32 [[MAD:v[0-9]+]], 2.0, |[[X]]|, v{{[0-9]+}} |
| ; GCN-DAG: buffer_store_dword [[MUL2]] |
| ; GCN-DAG: buffer_store_dword [[MAD]] |
| ; GCN: s_endpgm |
| define void @multiple_use_fadd_fmad(float addrspace(1)* %out, float %x, float %y) #0 { |
| %out.gep.1 = getelementptr float, float addrspace(1)* %out, i32 1 |
| %x.abs = call float @llvm.fabs.f32(float %x) |
| %mul2 = fmul fast float %x.abs, 2.0 |
| %mad = fadd fast float %mul2, %y |
| store float %mul2, float addrspace(1)* %out |
| store float %mad, float addrspace(1)* %out.gep.1 |
| ret void |
| } |
| |
| ; GCN-LABEL: {{^}}multiple_use_fadd_multi_fmad: |
| ; GCN: v_mad_f32 {{v[0-9]+}}, 2.0, |[[X:s[0-9]+]]|, v{{[0-9]+}} |
| ; GCN: v_mad_f32 {{v[0-9]+}}, 2.0, |[[X]]|, v{{[0-9]+}} |
| define void @multiple_use_fadd_multi_fmad(float addrspace(1)* %out, float %x, float %y, float %z) #0 { |
| %out.gep.1 = getelementptr float, float addrspace(1)* %out, i32 1 |
| %x.abs = call float @llvm.fabs.f32(float %x) |
| %mul2 = fmul fast float %x.abs, 2.0 |
| %mad0 = fadd fast float %mul2, %y |
| %mad1 = fadd fast float %mul2, %z |
| store float %mad0, float addrspace(1)* %out |
| store float %mad1, float addrspace(1)* %out.gep.1 |
| ret void |
| } |
| |
| ; GCN-LABEL: {{^}}fmul_x2_xn2: |
| ; GCN: v_mul_f32_e64 [[TMP0:v[0-9]+]], -4.0, [[X:s[0-9]+]] |
| ; GCN: v_mul_f32_e32 [[RESULT:v[0-9]+]], [[X]], [[TMP0]] |
| ; GCN: buffer_store_dword [[RESULT]] |
| define void @fmul_x2_xn2(float addrspace(1)* %out, float %x, float %y) #0 { |
| %out.gep.1 = getelementptr float, float addrspace(1)* %out, i32 1 |
| %mul2 = fmul fast float %x, 2.0 |
| %muln2 = fmul fast float %x, -2.0 |
| %mul = fmul fast float %mul2, %muln2 |
| store float %mul, float addrspace(1)* %out |
| ret void |
| } |
| |
| ; GCN-LABEL: {{^}}fmul_x2_xn3: |
| ; GCN: v_mov_b32_e32 [[K:v[0-9]+]], 0xc0c00000 |
| ; GCN: v_mul_f32_e32 [[TMP0:v[0-9]+]], [[X:s[0-9]+]], [[K]] |
| ; GCN: v_mul_f32_e32 [[RESULT:v[0-9]+]], [[X]], [[TMP0]] |
| ; GCN: buffer_store_dword [[RESULT]] |
| define void @fmul_x2_xn3(float addrspace(1)* %out, float %x, float %y) #0 { |
| %out.gep.1 = getelementptr float, float addrspace(1)* %out, i32 1 |
| %mul2 = fmul fast float %x, 2.0 |
| %muln2 = fmul fast float %x, -3.0 |
| %mul = fmul fast float %mul2, %muln2 |
| store float %mul, float addrspace(1)* %out |
| ret void |
| } |
| |
| attributes #0 = { nounwind "unsafe-fp-math"="true" } |
| attributes #1 = { nounwind readnone } |