forked from OSchip/llvm-project
51 lines
1.7 KiB
LLVM
51 lines
1.7 KiB
LLVM
; RUN: opt %loadPolly -polly-detect-unprofitable -S -polly-prepare -polly-model-phi-nodes=true < %s | FileCheck %s -check-prefix=PHI
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; RUN: opt %loadPolly -polly-detect-unprofitable -S -polly-prepare -polly-model-phi-nodes=false < %s | FileCheck %s
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; int f(int *A, int N) {
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; int i, sum = 0;
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; for (i = 0; i < N; i++)
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; sum += A[i];
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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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define i32 @f(i32* %A, i32 %N) {
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entry:
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%cmp1 = icmp sgt i32 %N, 0
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br i1 %cmp1, label %for.inc.lr.ph, label %for.end
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for.inc.lr.ph: ; preds = %entry
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%0 = zext i32 %N to i64
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br label %for.inc
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for.inc: ; preds = %for.inc.lr.ph, %for.inc
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%sum.03 = phi i32 [ 0, %for.inc.lr.ph ], [ %add, %for.inc ]
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%indvars.iv2 = phi i64 [ 0, %for.inc.lr.ph ], [ %indvars.iv.next, %for.inc ]
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%arrayidx = getelementptr i32, i32* %A, i64 %indvars.iv2
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%tmp1 = load i32, i32* %arrayidx, align 4
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%add = add nsw i32 %tmp1, %sum.03
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%indvars.iv.next = add nuw nsw i64 %indvars.iv2, 1
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%exitcond = icmp ne i64 %indvars.iv.next, %0
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br i1 %exitcond, label %for.inc, label %for.cond.for.end_crit_edge
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for.cond.for.end_crit_edge: ; preds = %for.inc
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%add.lcssa = phi i32 [ %add, %for.inc ]
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br label %for.end
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for.end: ; preds = %for.cond.for.end_crit_edge, %entry
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%sum.0.lcssa = phi i32 [ %add.lcssa, %for.cond.for.end_crit_edge ], [ 0, %entry ]
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ret i32 %sum.0.lcssa
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}
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; Verify that only two allocas are created.
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; Both are needed for the %sum.0 PHI node and none should be created for the
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; %sum.0.lcssa PHI node
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; CHECK: alloca
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; CHECK: alloca
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; CHECK-NOT: alloca
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; PHI-NOT: alloca
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