forked from OSchip/llvm-project
62 lines
2.2 KiB
LLVM
62 lines
2.2 KiB
LLVM
; RUN: opt %loadPolly -polly-scops -analyze < %s | FileCheck %s
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;
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; The assumed context is tricky here as the equality test for the inner loop
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; allows an "unbounded" loop trip count. We assume that does not happen, thus
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; if N <= 1 the outer loop is not executed and we are done, if N >= 3 the
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; equality test in the inner exit condition will trigger at some point and,
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; finally, if N == 2 we would have an unbounded inner loop.
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;
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; CHECK: Assumed Context:
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; CHECK-NEXT: [N] -> { : N >= 3 or N <= 1 }
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;
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; int jd(int *restrict A, int x, int N) {
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; for (int i = 1; i < N; i++)
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; for (int j = 3; j < N; j++)
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; x += A[i];
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; return x;
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; }
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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 @jd(i32* noalias %A, i32 %x, i32 %N) {
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entry:
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%tmp = sext i32 %N to i64
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br label %for.cond
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for.cond: ; preds = %for.inc4, %entry
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc4 ], [ 1, %entry ]
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%x.addr.0 = phi i32 [ %x, %entry ], [ %x.addr.1.lcssa, %for.inc4 ]
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%cmp = icmp slt i64 %indvars.iv, %tmp
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br i1 %cmp, label %for.body, label %for.end6
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for.body: ; preds = %for.cond
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br label %for.cond1
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for.cond1: ; preds = %for.inc, %for.body
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%x.addr.1 = phi i32 [ %x.addr.0, %for.body ], [ %add, %for.inc ]
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%j.0 = phi i32 [ 3, %for.body ], [ %inc, %for.inc ]
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%exitcond = icmp ne i32 %j.0, %N
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br i1 %exitcond, label %for.body3, label %for.end
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for.body3: ; preds = %for.cond1
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br label %for.inc
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for.inc: ; preds = %for.body3
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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%tmp1 = load i32, i32* %arrayidx, align 4
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%add = add nsw i32 %x.addr.1, %tmp1
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%inc = add i32 %j.0, 1
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br label %for.cond1
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for.end: ; preds = %for.cond1
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%x.addr.1.lcssa = phi i32 [ %x.addr.1, %for.cond1 ]
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br label %for.inc4
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for.inc4: ; preds = %for.end
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%indvars.iv.next = add i64 %indvars.iv, 1
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br label %for.cond
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for.end6: ; preds = %for.cond
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ret i32 %x.addr.0
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}
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