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; 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
}
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