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2ad38be2cf
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47297 91177308-0d34-0410-b5e6-96231b3b80d8
25 lines
883 B
LLVM
25 lines
883 B
LLVM
; When constant propogating terminator instructions, the basic block iterator
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; was not updated to refer to the final position of the new terminator. This
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; can be bad, f.e. because constproping a terminator can lead to the
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; destruction of PHI nodes, which invalidates the iterator!
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;
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; Fixed by adding new arguments to ConstantFoldTerminator
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;
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; RUN: llvm-as < %s | opt -constprop
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define void @build_tree(i32 %ml) {
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; <label>:0
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br label %bb2
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bb2: ; preds = %bb2, %0
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%reg137 = phi i32 [ %reg140, %bb2 ], [ 12, %0 ] ; <i32> [#uses=1]
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%reg138 = phi i32 [ %reg139, %bb2 ], [ 0, %0 ] ; <i32> [#uses=1]
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%reg139 = add i32 %reg138, 1 ; <i32> [#uses=1]
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%reg140 = add i32 %reg137, -1 ; <i32> [#uses=1]
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br i1 false, label %bb2, label %bb3
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bb3: ; preds = %bb2
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ret void
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}
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