derek.holloway
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41 lines
1.2 KiB
LLVM
41 lines
1.2 KiB
LLVM
; RUN: opt -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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; Do not version this loop because of a convergent operation
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; CHECK-LABEL: @f(
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; CHECK: call i32 @llvm.convergent(
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; CHECK-NOT: call i32 @llvm.convergent(
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define void @f(ptr %a, ptr %b, ptr %c) #0 {
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entry:
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br label %for.body
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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, ptr %a, i64 %ind
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%loadA = load i32, ptr %arrayidxA, align 4
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%arrayidxB = getelementptr inbounds i32, ptr %b, i64 %ind
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%loadB = load i32, ptr %arrayidxB, align 4
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%convergentB = call i32 @llvm.convergent(i32 %loadB)
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%mulC = mul i32 %loadA, %convergentB
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%arrayidxC = getelementptr inbounds i32, ptr %c, i64 %ind
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store i32 %mulC, ptr %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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declare i32 @llvm.convergent(i32) #1
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attributes #0 = { nounwind convergent }
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attributes #1 = { nounwind readnone convergent }
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