derek.holloway
7502bf64a4
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40 lines
2.1 KiB
LLVM
40 lines
2.1 KiB
LLVM
; RUN: opt < %s -S -passes=loop-unroll -unroll-threshold=25 -unroll-partial-threshold=25 -unroll-runtime -unroll-runtime-epilog=true -unroll-count=8 | FileCheck %s -check-prefix=EPILOG
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; RUN: opt < %s -S -passes=loop-unroll -unroll-threshold=25 -unroll-partial-threshold=25 -unroll-runtime -unroll-runtime-epilog=false | FileCheck %s -check-prefix=PROLOG
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; RUN: opt < %s -S -passes='require<opt-remark-emit>,loop-unroll' -unroll-threshold=25 -unroll-partial-threshold=25 -unroll-runtime -unroll-runtime-epilog=true -unroll-count=8 | FileCheck %s -check-prefix=EPILOG
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; RUN: opt < %s -S -passes='require<opt-remark-emit>,loop-unroll' -unroll-threshold=25 -unroll-partial-threshold=25 -unroll-runtime -unroll-runtime-epilog=false | FileCheck %s -check-prefix=PROLOG
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; Choose a smaller, power-of-two, unroll count if the loop is too large.
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; This test makes sure we're not unrolling 'odd' counts
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; EPILOG: for.body:
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; EPILOG: br i1 %niter.ncmp.3, label %for.end.loopexit.unr-lcssa{{.*}}, label %for.body
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; EPILOG-NOT: br i1 %niter.ncmp.4, label %for.end.loopexit.unr-lcssa{{.*}}, label %for.body
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; EPILOG: for.body.epil:
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; PROLOG: for.body.prol:
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; PROLOG: for.body:
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; PROLOG: br i1 %exitcond.3, label %for.end.loopexit{{.*}}, label %for.body
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; PROLOG-NOT: br i1 %exitcond.4, label %for.end.loopexit{{.*}}, label %for.body
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define i32 @test(ptr nocapture %a, i32 %n) nounwind uwtable readonly {
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entry:
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%cmp1 = icmp eq i32 %n, 0
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br i1 %cmp1, label %for.end, label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
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%sum.02 = phi i32 [ %add, %for.body ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv
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%0 = load i32, ptr %arrayidx, align 4
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%add = add nsw i32 %0, %sum.02
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%indvars.iv.next = add i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body, %entry
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%sum.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ]
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ret i32 %sum.0.lcssa
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}
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