1 ; RUN: opt < %s -basicaa -slp-vectorizer -dce -S -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx | FileCheck %s 2 3 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" 4 target triple = "x86_64-apple-macosx10.8.0" 5 6 ; double foo(double * restrict b, double * restrict a, int n, int m) { 7 ; double r=a[1]; 8 ; double g=a[0]; 9 ; double x; 10 ; for (int i=0; i < 100; i++) { 11 ; r += 10; 12 ; g += 10; 13 ; r *= 4; 14 ; g *= 4; 15 ; x = g; <----- external user! 16 ; r += 4; 17 ; g += 4; 18 ; } 19 ; b[0] = g; 20 ; b[1] = r; 21 ; 22 ; return x; <-- must extract here! 23 ; } 24 25 ;CHECK: ext_user 26 ;CHECK: phi <2 x double> 27 ;CHECK: fadd <2 x double> 28 ;CHECK: fmul <2 x double> 29 ;CHECK: br 30 ;CHECK: store <2 x double> 31 ;CHECK: extractelement <2 x double> 32 ;CHECK: ret double 33 34 define double @ext_user(double* noalias nocapture %B, double* noalias nocapture %A, i32 %n, i32 %m) { 35 entry: 36 %arrayidx = getelementptr inbounds double, double* %A, i64 1 37 %0 = load double, double* %arrayidx, align 8 38 %1 = load double, double* %A, align 8 39 br label %for.body 40 41 for.body: ; preds = %for.body, %entry 42 %i.020 = phi i32 [ 0, %entry ], [ %inc, %for.body ] 43 %G.019 = phi double [ %1, %entry ], [ %add5, %for.body ] 44 %R.018 = phi double [ %0, %entry ], [ %add4, %for.body ] 45 %add = fadd double %R.018, 1.000000e+01 46 %add2 = fadd double %G.019, 1.000000e+01 47 %mul = fmul double %add, 4.000000e+00 48 %mul3 = fmul double %add2, 4.000000e+00 49 %add4 = fadd double %mul, 4.000000e+00 50 %add5 = fadd double %mul3, 4.000000e+00 51 %inc = add nsw i32 %i.020, 1 52 %exitcond = icmp eq i32 %inc, 100 53 br i1 %exitcond, label %for.end, label %for.body 54 55 for.end: ; preds = %for.body 56 store double %add5, double* %B, align 8 57 %arrayidx7 = getelementptr inbounds double, double* %B, i64 1 58 store double %add4, double* %arrayidx7, align 8 59 ret double %mul3 60 } 61 62 ; A need-to-gather entry cannot be an external use of the scalar element. 63 ; Instead the insertelement instructions of the need-to-gather entry are the 64 ; external users. 65 ; This test would assert because we would keep the scalar fpext and fadd alive. 66 ; PR18129 67 68 ; CHECK-LABEL: needtogather 69 define i32 @needtogather(double *noalias %a, i32 *noalias %b, float * noalias %c, 70 i32 * noalias %d) { 71 entry: 72 %0 = load i32, i32* %d, align 4 73 %conv = sitofp i32 %0 to float 74 %1 = load float, float* %c 75 %sub = fsub float 0.000000e+00, %1 76 %mul = fmul float %sub, 0.000000e+00 77 %add = fadd float %conv, %mul 78 %conv1 = fpext float %add to double 79 %sub3 = fsub float 1.000000e+00, %1 80 %mul4 = fmul float %sub3, 0.000000e+00 81 %add5 = fadd float %conv, %mul4 82 %conv6 = fpext float %add5 to double 83 %tobool = fcmp une float %add, 0.000000e+00 84 br i1 %tobool, label %if.then, label %if.end 85 86 if.then: 87 br label %if.end 88 89 if.end: 90 %storemerge = phi double [ %conv6, %if.then ], [ %conv1, %entry ] 91 %e.0 = phi double [ %conv1, %if.then ], [ %conv6, %entry ] 92 store double %storemerge, double* %a, align 8 93 %conv7 = fptosi double %e.0 to i32 94 store i32 %conv7, i32* %b, align 4 95 ret i32 undef 96 } 97
