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20376d1131
The exit blocks of the versioned and non-versioned loops are not dedicated and thus the two loops are not in simplify form. Insert dummy exit blocks after loop versioning with `formDedicatedExits()` to preserve the simplify form for subsequence passes. Reviewed By: aeubanks Differential Revision: https://reviews.llvm.org/D89569
53 lines
1.6 KiB
LLVM
53 lines
1.6 KiB
LLVM
; RUN: opt -basic-aa -loop-versioning -S < %s | FileCheck %s
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; RUN: opt -aa-pipeline=basic-aa -passes=loop-versioning -S < %s | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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; Version this loop with overlap checks between a, c and b, c.
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define void @f(i32* %a, i32* %b, i32* %c) {
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entry:
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br label %for.body
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; CHECK: for.body.lver.check:
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; CHECK: icmp
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; CHECK: icmp
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; CHECK: icmp
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; CHECK: icmp
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; CHECK-NOT: icmp
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; CHECK: br i1 %memcheck.conflict, label %for.body.ph.lver.orig, label %for.body.ph
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; CHECK: for.body.ph.lver.orig:
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; CHECK: for.body.lver.orig:
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; CHECK: br i1 %exitcond.lver.orig, label %for.end.loopexit, label %for.body.lver.orig
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; CHECK: for.body.ph:
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; CHECK: for.body:
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; CHECK: br i1 %exitcond, label %for.end.loopexit12, label %for.body
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; CHECK: for.end.loopexit:
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; CHECK: br label %for.end
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; CHECK: for.end.loopexit12:
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; CHECK: br label %for.end
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; CHECK: for.end:
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for.body: ; preds = %for.body, %entry
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%ind = phi i64 [ 0, %entry ], [ %add, %for.body ]
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%arrayidxA = getelementptr inbounds i32, i32* %a, i64 %ind
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%loadA = load i32, i32* %arrayidxA, align 4
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%arrayidxB = getelementptr inbounds i32, i32* %b, i64 %ind
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%loadB = load i32, i32* %arrayidxB, align 4
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%mulC = mul i32 %loadA, %loadB
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%arrayidxC = getelementptr inbounds i32, i32* %c, i64 %ind
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store i32 %mulC, i32* %arrayidxC, align 4
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%add = add nuw nsw i64 %ind, 1
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%exitcond = icmp eq i64 %add, 20
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret void
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}
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