8a8aca4299
After region exit simplification, the incoming block of a phi node in the SCoP region's exit block lands outside of the region. Since we treat SCoPs as if this already happened, we need to account for that when looking for outside uses of scalars (i.e. escaping scalars). llvm-svn: 309271
38 lines
892 B
LLVM
38 lines
892 B
LLVM
; RUN: opt %loadPolly -polly-scops -polly-simplify -analyze < %s | FileCheck %s
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;
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; The use of %sum.next by %phi counts as an escaping use.
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; Don't remove the scalar write of %sum.next.
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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 float @foo(float* %A) {
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entry:
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br label %header
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header:
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fence seq_cst
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br i1 true, label %body, label %exit
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body:
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%i = phi i64 [ 0, %header ], [ %next, %body ]
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%sum = phi float [ 0.0, %header ], [ %sum.next, %body ]
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%arrayidx = getelementptr float, float* %A, i64 %i
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%next = add nuw nsw i64 %i, 1
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%val = load float, float* %arrayidx
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%sum.next = fadd float %sum, %val
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%cond = icmp ne i64 %i, 100
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br i1 %cond, label %body, label %after
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after:
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br label %exit
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exit:
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%phi = phi float [%sum.next, %after], [0.0, %header]
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ret float %phi
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}
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; CHECK: Statistics {
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; CHECK: Dead accesses removed: 0
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; CHECK: }
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