derek.holloway
7502bf64a4
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57 lines
1.6 KiB
LLVM
57 lines
1.6 KiB
LLVM
; RUN: opt %loadNPMPolly -polly-stmt-granularity=bb -polly-process-unprofitable=false -polly-unprofitable-scalar-accs=false '-passes=polly-custom<prune>' -disable-output -stats < %s 2>&1 | FileCheck -match-full-lines %s
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; REQUIRES: asserts
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;
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; Skip this SCoP for having scalar dependencies between all statements,
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; but only after ScopInfo (because optimization passes using ScopInfo such
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; as DeLICM might remove these scalar dependencies).
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;
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; double x = 0;
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; for (int i = 0; i < n; i += 1)
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; for (int j = 0; j < m; j += 1) {
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; B[0] = x;
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; x = A[0];
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; }
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; return x;
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;
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define double @func(i32 %n, i32 %m, ptr noalias nonnull %A, ptr noalias nonnull %B) {
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entry:
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br label %outer.for
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outer.for:
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%outer.phi = phi double [0.0, %entry], [%inner.phi, %outer.inc]
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%i = phi i32 [0, %entry], [%i.inc, %outer.inc]
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%i.cmp = icmp slt i32 %i, %n
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br i1 %i.cmp, label %inner.for, label %outer.exit
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inner.for:
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%inner.phi = phi double [%outer.phi, %outer.for], [%load, %inner.inc]
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%j = phi i32 [0, %outer.for], [%j.inc, %inner.inc]
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%j.cmp = icmp slt i32 %j, %m
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br i1 %j.cmp, label %body, label %inner.exit
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body:
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store double %inner.phi, ptr %B
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%load = load double, ptr %A
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br label %inner.inc
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inner.inc:
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%j.inc = add nuw nsw i32 %j, 1
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br label %inner.for
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inner.exit:
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br label %outer.inc
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outer.inc:
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%i.inc = add nuw nsw i32 %i, 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 double %outer.phi
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}
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; CHECK: 1 polly-prune-unprofitable - Number of pruned SCoPs because it they cannot be optimized in a significant way
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