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https://github.com/RPCS3/llvm-mirror.git
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f601ce3709
The original patch caused crashes because it could derefence a null pointer for SelectionDAGTargetInfo for targets that do not define it. Evaluates fmul+fadd -> fmadd combines and similar code sequences in the machine combiner. It adds support for float and double similar to the existing integer implementation. The key features are: - DAGCombiner checks whether it should combine greedily or let the machine combiner do the evaluation. This is only supported on ARM64. - It gives preference to throughput over latency: the heuristic used is to combine always in loops. The targets decides whether the machine combiner should optimize for throughput or latency. - Supports for fmadd, f(n)msub, fmla, fmls patterns - On by default at O3 ffast-math llvm-svn: 267328
137 lines
6.6 KiB
LLVM
137 lines
6.6 KiB
LLVM
; RUN: llc < %s -O=3 -mtriple=arm64-apple-ios -mcpu=cyclone -enable-unsafe-fp-math | FileCheck %s
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define void @foo_2d(double* %src) {
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; CHECK-LABEL: %entry
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; CHECK: fmul {{d[0-9]+}}, {{d[0-9]+}}, {{d[0-9]+}}
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; CHECK: fmul {{d[0-9]+}}, {{d[0-9]+}}, {{d[0-9]+}}
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entry:
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%arrayidx1 = getelementptr inbounds double, double* %src, i64 5
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%arrayidx2 = getelementptr inbounds double, double* %src, i64 11
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%tmp = bitcast double* %arrayidx1 to <2 x double>*
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%tmp1 = load double, double* %arrayidx2, align 8
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%tmp2 = load double, double* %arrayidx1, align 8
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%fmul = fmul fast double %tmp1, %tmp1
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%fmul2 = fmul fast double %tmp2, 0x3F94AFD6A052BF5B
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%fadd = fadd fast double %fmul, %fmul2
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br label %for.body
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; CHECK-LABEL: %for.body
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; CHECK: fmla.2d {{v[0-9]+}}, {{v[0-9]+}}, {{v[0-9]+}}
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; CHECK: fmla.2d {{v[0-9]+}}, {{v[0-9]+}}, {{v[0-9]+}}[0]
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; CHECK: fmla.d {{d[0-9]+}}, {{d[0-9]+}}, {{v[0-9]+}}[0]
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%arrayidx3 = getelementptr inbounds double, double* %src, i64 %indvars.iv.next
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%tmp3 = load double, double* %arrayidx3, align 8
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%add = fadd fast double %tmp3, %tmp3
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%mul = fmul fast double %add, %fadd
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%e1 = insertelement <2 x double> undef, double %add, i32 0
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%e2 = insertelement <2 x double> %e1, double %add, i32 1
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%add2 = fadd fast <2 x double> %e2, <double 3.000000e+00, double -3.000000e+00>
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%e3 = insertelement <2 x double> undef, double %mul, i32 0
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%e4 = insertelement <2 x double> %e3, double %mul, i32 1
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%mul2 = fmul fast <2 x double> %add2,<double 3.000000e+00, double -3.000000e+00>
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%e5 = insertelement <2 x double> undef, double %add, i32 0
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%e6 = insertelement <2 x double> %e5, double %add, i32 1
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%add3 = fadd fast <2 x double> %mul2, <double 3.000000e+00, double -3.000000e+00>
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%mulx = fmul fast <2 x double> %add2, %e2
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%addx = fadd fast <2 x double> %mulx, %e4
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%e7 = insertelement <2 x double> undef, double %mul, i32 0
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%e8 = insertelement <2 x double> %e7, double %mul, i32 1
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%e9 = fmul fast <2 x double> %addx, %add3
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store <2 x double> %e9, <2 x double>* %tmp, align 8
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%e10 = extractelement <2 x double> %add3, i32 0
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%mul3 = fmul fast double %mul, %e10
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%add4 = fadd fast double %mul3, %mul
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store double %add4, double* %arrayidx2, align 8
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%exitcond = icmp eq i64 %indvars.iv.next, 25
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret void
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}
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define void @foo_2s(float* %src) {
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entry:
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%arrayidx1 = getelementptr inbounds float, float* %src, i64 5
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%arrayidx2 = getelementptr inbounds float, float* %src, i64 11
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%tmp = bitcast float* %arrayidx1 to <2 x float>*
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br label %for.body
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; CHECK-LABEL: %for.body
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; CHECK: fmla.2s {{v[0-9]+}}, {{v[0-9]+}}, {{v[0-9]+}}
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; CHECK: fmla.2s {{v[0-9]+}}, {{v[0-9]+}}, {{v[0-9]+}}[0]
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; CHECK: fmla.s {{s[0-9]+}}, {{s[0-9]+}}, {{v[0-9]+}}[0]
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%arrayidx3 = getelementptr inbounds float, float* %src, i64 %indvars.iv.next
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%tmp1 = load float, float* %arrayidx3, align 8
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%add = fadd fast float %tmp1, %tmp1
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%mul = fmul fast float %add, %add
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%e1 = insertelement <2 x float> undef, float %add, i32 0
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%e2 = insertelement <2 x float> %e1, float %add, i32 1
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%add2 = fadd fast <2 x float> %e2, <float 3.000000e+00, float -3.000000e+00>
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%e3 = insertelement <2 x float> undef, float %mul, i32 0
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%e4 = insertelement <2 x float> %e3, float %mul, i32 1
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%mul2 = fmul fast <2 x float> %add2,<float 3.000000e+00, float -3.000000e+00>
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%e5 = insertelement <2 x float> undef, float %add, i32 0
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%e6 = insertelement <2 x float> %e5, float %add, i32 1
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%add3 = fadd fast <2 x float> %mul2, <float 3.000000e+00, float -3.000000e+00>
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%mulx = fmul fast <2 x float> %add2, %e2
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%addx = fadd fast <2 x float> %mulx, %e4
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%e7 = insertelement <2 x float> undef, float %mul, i32 0
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%e8 = insertelement <2 x float> %e7, float %mul, i32 1
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%e9 = fmul fast <2 x float> %addx, %add3
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store <2 x float> %e9, <2 x float>* %tmp, align 8
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%e10 = extractelement <2 x float> %add3, i32 0
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%mul3 = fmul fast float %mul, %e10
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%add4 = fadd fast float %mul3, %mul
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store float %add4, float* %arrayidx2, align 8
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%exitcond = icmp eq i64 %indvars.iv.next, 25
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret void
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}
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define void @foo_4s(float* %src) {
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entry:
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%arrayidx1 = getelementptr inbounds float, float* %src, i64 5
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%arrayidx2 = getelementptr inbounds float, float* %src, i64 11
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%tmp = bitcast float* %arrayidx1 to <4 x float>*
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br label %for.body
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; CHECK-LABEL: %for.body
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; CHECK: fmla.4s {{v[0-9]+}}, {{v[0-9]+}}, {{v[0-9]+}}
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; CHECK: fmla.4s {{v[0-9]+}}, {{v[0-9]+}}, {{v[0-9]+}}[0]
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%arrayidx3 = getelementptr inbounds float, float* %src, i64 %indvars.iv.next
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%tmp1 = load float, float* %arrayidx3, align 8
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%add = fadd fast float %tmp1, %tmp1
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%mul = fmul fast float %add, %add
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%e1 = insertelement <4 x float> undef, float %add, i32 0
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%e2 = insertelement <4 x float> %e1, float %add, i32 1
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%add2 = fadd fast <4 x float> %e2, <float 3.000000e+00, float -3.000000e+00, float 5.000000e+00, float 7.000000e+00>
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%e3 = insertelement <4 x float> undef, float %mul, i32 0
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%e4 = insertelement <4 x float> %e3, float %mul, i32 1
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%mul2 = fmul fast <4 x float> %add2,<float 3.000000e+00, float -3.000000e+00, float 5.000000e+00, float 7.000000e+00>
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%e5 = insertelement <4 x float> undef, float %add, i32 0
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%e6 = insertelement <4 x float> %e5, float %add, i32 1
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%add3 = fadd fast <4 x float> %mul2, <float 3.000000e+00, float -3.000000e+00, float 5.000000e+00, float 7.000000e+00>
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%mulx = fmul fast <4 x float> %add2, %e2
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%addx = fadd fast <4 x float> %mulx, %e4
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%e7 = insertelement <4 x float> undef, float %mul, i32 0
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%e8 = insertelement <4 x float> %e7, float %mul, i32 1
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%e9 = fmul fast <4 x float> %addx, %add3
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store <4 x float> %e9, <4 x float>* %tmp, align 8
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%e10 = extractelement <4 x float> %add3, i32 0
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%mul3 = fmul fast float %mul, %e10
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store float %mul3, float* %arrayidx2, align 8
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%exitcond = icmp eq i64 %indvars.iv.next, 25
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret void
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}
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