forked from OSchip/llvm-project
74 lines
1.6 KiB
LLVM
74 lines
1.6 KiB
LLVM
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; RUN: opt %loadPolly -polly-delicm -analyze < %s | FileCheck %s
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;
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; void func(double *A) {
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; fsomeval = 21.0 + 21.0;
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; for (int j = 0; j < 2; j += 1) { /* outer */
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; double phi = 0.0;
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; for (int i = 0; i < 4; i += 1) /* reduction */
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; phi += 4.2;
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; A[j] = fsomeval;
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; }
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; }
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;
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; Check that fsomeval is not mapped to A[j] because it is read-only.
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; There is no advantage in mapping values not modified within the SCoP.
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;
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define void @func(double* noalias nonnull %A) {
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entry:
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%fsomeval = fadd double 21.0, 21.0
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br label %outer.preheader
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outer.preheader:
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br label %outer.for
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outer.for:
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%j = phi i32 [0, %outer.preheader], [%j.inc, %outer.inc]
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%j.cmp = icmp slt i32 %j, 2
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br i1 %j.cmp, label %reduction.preheader, label %outer.exit
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reduction.preheader:
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br label %reduction.for
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reduction.for:
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%i = phi i32 [0, %reduction.preheader], [%i.inc, %reduction.inc]
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%phi = phi double [0.0, %reduction.preheader], [%add, %reduction.inc]
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%i.cmp = icmp slt i32 %i, 4
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br i1 %i.cmp, label %body, label %reduction.exit
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body:
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%add = fadd double %phi, 4.2
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br label %reduction.inc
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reduction.inc:
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%i.inc = add nuw nsw i32 %i, 1
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br label %reduction.for
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reduction.exit:
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%A_idx = getelementptr inbounds double, double* %A, i32 %j
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store double %fsomeval, double* %A_idx
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br label %outer.inc
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outer.inc:
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%j.inc = add nuw nsw i32 %j, 1
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br label %outer.for
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outer.exit:
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br label %return
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return:
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ret void
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}
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; CHECK: Statistics {
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; CHECK: Compatible overwrites: 1
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; CHECK: }
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; CHECK: No modification has been made
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