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