066dbf3f8e
In order to speed up compile time and to avoid random timeouts we now separately track assumptions and restrictions. In this context assumptions describe parameter valuations we need and restrictions describe parameter valuations we do not allow. During AST generation we create a runtime check for both, whereas the one for the restrictions is negated before a conjunction is build. Except the In-Bounds assumptions we currently only track restrictions. Differential Revision: http://reviews.llvm.org/D17247 llvm-svn: 262328
64 lines
2.3 KiB
LLVM
64 lines
2.3 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] -> { : }
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; CHECK: Invalid Context:
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; CHECK-NEXT: [N] -> { : N = 2 }
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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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