97 lines
3.2 KiB
LLVM
97 lines
3.2 KiB
LLVM
; RUN: opt < %s -basicaa -slp-vectorizer -dce -S -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.8.0"
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; double foo(double * restrict b, double * restrict a, int n, int m) {
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; double r=a[1];
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; double g=a[0];
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; double x;
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; for (int i=0; i < 100; i++) {
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; r += 10;
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; g += 10;
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; r *= 4;
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; g *= 4;
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; x = g; <----- external user!
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; r += 4;
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; g += 4;
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; }
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; b[0] = g;
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; b[1] = r;
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;
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; return x; <-- must extract here!
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; }
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;CHECK: ext_user
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;CHECK: phi <2 x double>
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;CHECK: fadd <2 x double>
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;CHECK: fmul <2 x double>
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;CHECK: br
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;CHECK: store <2 x double>
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;CHECK: extractelement <2 x double>
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;CHECK: ret double
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define double @ext_user(double* noalias nocapture %B, double* noalias nocapture %A, i32 %n, i32 %m) {
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entry:
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%arrayidx = getelementptr inbounds double, double* %A, i64 1
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%0 = load double, double* %arrayidx, align 8
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%1 = load double, double* %A, align 8
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%i.020 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
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%G.019 = phi double [ %1, %entry ], [ %add5, %for.body ]
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%R.018 = phi double [ %0, %entry ], [ %add4, %for.body ]
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%add = fadd double %R.018, 1.000000e+01
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%add2 = fadd double %G.019, 1.000000e+01
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%mul = fmul double %add, 4.000000e+00
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%mul3 = fmul double %add2, 4.000000e+00
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%add4 = fadd double %mul, 4.000000e+00
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%add5 = fadd double %mul3, 4.000000e+00
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%inc = add nsw i32 %i.020, 1
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%exitcond = icmp eq i32 %inc, 100
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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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store double %add5, double* %B, align 8
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%arrayidx7 = getelementptr inbounds double, double* %B, i64 1
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store double %add4, double* %arrayidx7, align 8
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ret double %mul3
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}
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; A need-to-gather entry cannot be an external use of the scalar element.
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; Instead the insertelement instructions of the need-to-gather entry are the
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; external users.
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; This test would assert because we would keep the scalar fpext and fadd alive.
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; PR18129
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; CHECK-LABEL: needtogather
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define i32 @needtogather(double *noalias %a, i32 *noalias %b, float * noalias %c,
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i32 * noalias %d) {
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entry:
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%0 = load i32, i32* %d, align 4
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%conv = sitofp i32 %0 to float
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%1 = load float, float* %c
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%sub = fsub float 0.000000e+00, %1
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%mul = fmul float %sub, 0.000000e+00
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%add = fadd float %conv, %mul
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%conv1 = fpext float %add to double
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%sub3 = fsub float 1.000000e+00, %1
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%mul4 = fmul float %sub3, 0.000000e+00
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%add5 = fadd float %conv, %mul4
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%conv6 = fpext float %add5 to double
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%tobool = fcmp une float %add, 0.000000e+00
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br i1 %tobool, label %if.then, label %if.end
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if.then:
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br label %if.end
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if.end:
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%storemerge = phi double [ %conv6, %if.then ], [ %conv1, %entry ]
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%e.0 = phi double [ %conv1, %if.then ], [ %conv6, %entry ]
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store double %storemerge, double* %a, align 8
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%conv7 = fptosi double %e.0 to i32
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store i32 %conv7, i32* %b, align 4
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ret i32 undef
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}
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