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This was increasing the instruction count if the fadd has multiple uses. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242498 91177308-0d34-0410-b5e6-96231b3b80d8
103 lines
4.0 KiB
LLVM
103 lines
4.0 KiB
LLVM
; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=GCN %s
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; Make sure (fmul (fadd x, x), c) -> (fmul x, (fmul 2.0, c)) doesn't
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; make add an instruction if the fadd has more than one use.
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declare float @llvm.fabs.f32(float) #1
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; GCN-LABEL: {{^}}multiple_fadd_use_test:
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; GCN: v_max_legacy_f32_e64 [[A16:v[0-9]+]],
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; GCN: v_add_f32_e32 [[A17:v[0-9]+]], [[A16]], [[A16]]
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; GCN: v_mul_f32_e32 [[A18:v[0-9]+]], [[A17]], [[A17]]
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; GCN: v_mad_f32 [[A20:v[0-9]+]], -[[A18]], [[A17]], 1.0
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; GCN: buffer_store_dword [[A20]]
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define void @multiple_fadd_use_test(float addrspace(1)* %out, float %x, float %y, float %z) #0 {
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%a11 = fadd fast float %y, -1.0
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%a12 = call float @llvm.fabs.f32(float %a11)
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%a13 = fadd fast float %x, -1.0
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%a14 = call float @llvm.fabs.f32(float %a13)
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%a15 = fcmp ogt float %a12, %a14
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%a16 = select i1 %a15, float %a12, float %a14
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%a17 = fmul fast float %a16, 2.0
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%a18 = fmul fast float %a17, %a17
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%a19 = fmul fast float %a18, %a17
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%a20 = fsub fast float 1.0, %a19
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store float %a20, float addrspace(1)* %out
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ret void
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}
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; GCN-LABEL: {{^}}multiple_use_fadd_fmac
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; GCN-DAG: v_add_f32_e64 [[MUL2:v[0-9]+]], [[X:s[0-9]+]], s{{[0-9]+}}
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; GCN-DAG: v_mac_f32_e64 [[MAD:v[0-9]+]], 2.0, [[X]]
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; GCN-DAG: buffer_store_dword [[MUL2]]
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; GCN-DAG: buffer_store_dword [[MAD]]
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; GCN: s_endpgm
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define void @multiple_use_fadd_fmac(float addrspace(1)* %out, float %x, float %y) #0 {
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%out.gep.1 = getelementptr float, float addrspace(1)* %out, i32 1
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%mul2 = fmul fast float %x, 2.0
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%mad = fadd fast float %mul2, %y
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store float %mul2, float addrspace(1)* %out
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store float %mad, float addrspace(1)* %out.gep.1
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ret void
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}
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; GCN-LABEL: {{^}}multiple_use_fadd_fmad:
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; GCN-DAG: v_add_f32_e64 [[MUL2:v[0-9]+]], |[[X:s[0-9]+]]|, |s{{[0-9]+}}|
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; GCN-DAG: v_mad_f32 [[MAD:v[0-9]+]], 2.0, |[[X]]|, v{{[0-9]+}}
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; GCN-DAG: buffer_store_dword [[MUL2]]
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; GCN-DAG: buffer_store_dword [[MAD]]
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; GCN: s_endpgm
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define void @multiple_use_fadd_fmad(float addrspace(1)* %out, float %x, float %y) #0 {
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%out.gep.1 = getelementptr float, float addrspace(1)* %out, i32 1
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%x.abs = call float @llvm.fabs.f32(float %x)
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%mul2 = fmul fast float %x.abs, 2.0
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%mad = fadd fast float %mul2, %y
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store float %mul2, float addrspace(1)* %out
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store float %mad, float addrspace(1)* %out.gep.1
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ret void
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}
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; GCN-LABEL: {{^}}multiple_use_fadd_multi_fmad:
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; GCN: v_mad_f32 {{v[0-9]+}}, 2.0, |[[X:s[0-9]+]]|, v{{[0-9]+}}
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; GCN: v_mad_f32 {{v[0-9]+}}, 2.0, |[[X]]|, v{{[0-9]+}}
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define void @multiple_use_fadd_multi_fmad(float addrspace(1)* %out, float %x, float %y, float %z) #0 {
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%out.gep.1 = getelementptr float, float addrspace(1)* %out, i32 1
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%x.abs = call float @llvm.fabs.f32(float %x)
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%mul2 = fmul fast float %x.abs, 2.0
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%mad0 = fadd fast float %mul2, %y
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%mad1 = fadd fast float %mul2, %z
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store float %mad0, float addrspace(1)* %out
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store float %mad1, float addrspace(1)* %out.gep.1
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ret void
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}
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; GCN-LABEL: {{^}}fmul_x2_xn2:
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; GCN: v_mul_f32_e64 [[TMP0:v[0-9]+]], -4.0, [[X:s[0-9]+]]
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; GCN: v_mul_f32_e32 [[RESULT:v[0-9]+]], [[X]], [[TMP0]]
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; GCN: buffer_store_dword [[RESULT]]
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define void @fmul_x2_xn2(float addrspace(1)* %out, float %x, float %y) #0 {
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%out.gep.1 = getelementptr float, float addrspace(1)* %out, i32 1
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%mul2 = fmul fast float %x, 2.0
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%muln2 = fmul fast float %x, -2.0
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%mul = fmul fast float %mul2, %muln2
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store float %mul, float addrspace(1)* %out
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ret void
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}
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; GCN-LABEL: {{^}}fmul_x2_xn3:
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; GCN: v_mov_b32_e32 [[K:v[0-9]+]], 0xc0c00000
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; GCN: v_mul_f32_e32 [[TMP0:v[0-9]+]], [[X:s[0-9]+]], [[K]]
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; GCN: v_mul_f32_e32 [[RESULT:v[0-9]+]], [[X]], [[TMP0]]
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; GCN: buffer_store_dword [[RESULT]]
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define void @fmul_x2_xn3(float addrspace(1)* %out, float %x, float %y) #0 {
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%out.gep.1 = getelementptr float, float addrspace(1)* %out, i32 1
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%mul2 = fmul fast float %x, 2.0
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%muln2 = fmul fast float %x, -3.0
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%mul = fmul fast float %mul2, %muln2
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store float %mul, float addrspace(1)* %out
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ret void
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}
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attributes #0 = { nounwind "unsafe-fp-math"="true" }
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attributes #1 = { nounwind readnone }
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