39 lines
1.2 KiB
LLVM
39 lines
1.2 KiB
LLVM
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; This test ensures loop versioning does not produce an invalid dominator tree
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; if the exit block of the loop (bb0) dominates the runtime check block
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; (bb1 will become the runtime check block).
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; RUN: opt -loop-distribute -enable-loop-distribute -verify-dom-info -S -o - %s > %t
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; RUN: opt -loop-simplify -loop-distribute -enable-loop-distribute -verify-dom-info -S -o - %s > %t
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; RUN: FileCheck --check-prefix CHECK-VERSIONING -input-file %t %s
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; RUN: opt -loop-versioning -verify-dom-info -S -o - %s > %t
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; RUN: opt -loop-simplify -loop-versioning -verify-dom-info -S -o - %s > %t
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; RUN: FileCheck --check-prefix CHECK-VERSIONING -input-file %t %s
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@c1 = external global i16
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define void @f(i16 %a) {
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br label %bb0
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bb0:
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br label %bb1
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bb1:
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%tmp1 = load i16, i16* @c1
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br label %bb2
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bb2:
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%tmp2 = phi i16 [ %tmp1, %bb1 ], [ %tmp3, %bb2 ]
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%tmp4 = getelementptr inbounds [1 x i32], [1 x i32]* undef, i32 0, i32 4
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store i32 1, i32* %tmp4
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%tmp5 = getelementptr inbounds [1 x i32], [1 x i32]* undef, i32 0, i32 9
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store i32 0, i32* %tmp5
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%tmp3 = add i16 %tmp2, 1
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store i16 %tmp2, i16* @c1
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%tmp6 = icmp sle i16 %tmp3, 0
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br i1 %tmp6, label %bb2, label %bb0
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}
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; Simple check to make sure loop versioning happened.
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; CHECK-VERSIONING: bb2.lver.check:
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