forked from OSchip/llvm-project
57 lines
2.0 KiB
LLVM
57 lines
2.0 KiB
LLVM
; RUN: opt %loadPolly -S -polly-prepare < %s | FileCheck %s
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; ModuleID = 'multiple_loops_trivial_phis.ll'
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;
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; int f(int * __restrict__ A) {
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; int i, j, sum = 0;
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; for (i = 0; i < 100; i++) {
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; sum *= 2;
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; for (j = 0; j < 100; j++) {
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; sum += A[i+j];
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; }
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; }
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; return sum;
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; }
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Function Attrs: nounwind uwtable
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define i32 @f(i32* noalias %A) #0 {
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entry:
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br label %for.body
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for.body: ; preds = %entry, %for.inc5
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%sum.04 = phi i32 [ 0, %entry ], [ %add4.lcssa, %for.inc5 ]
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%indvars.iv23 = phi i64 [ 0, %entry ], [ %2, %for.inc5 ]
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%mul = shl nsw i32 %sum.04, 1
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br label %for.inc
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for.inc: ; preds = %for.body, %for.inc
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%sum.12 = phi i32 [ %mul, %for.body ], [ %add4, %for.inc ]
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%indvars.iv1 = phi i64 [ 0, %for.body ], [ %1, %for.inc ]
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%0 = add i64 %indvars.iv23, %indvars.iv1
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%arrayidx = getelementptr i32* %A, i64 %0
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%tmp5 = load i32* %arrayidx, align 4
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%add4 = add nsw i32 %tmp5, %sum.12
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%1 = add nuw nsw i64 %indvars.iv1, 1
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%exitcond5 = icmp eq i64 %1, 100
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br i1 %exitcond5, label %for.inc5, label %for.inc
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for.inc5: ; preds = %for.inc
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%add4.lcssa = phi i32 [ %add4, %for.inc ]
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%2 = add nuw nsw i64 %indvars.iv23, 1
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%exitcond = icmp eq i64 %2, 100
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br i1 %exitcond, label %for.end7, label %for.body
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for.end7: ; preds = %for.inc5
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%add4.lcssa.lcssa = phi i32 [ %add4.lcssa, %for.inc5 ]
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ret i32 %add4.lcssa.lcssa
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}
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attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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; Verify that only two allocas are created. (instead of 4!)
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; CHECK: alloca
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; CHECK: alloca
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; CHECK-NOT: alloca
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