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d93e8a06b2
The problem of r191017 is that when GVN fabricate a val-number for a dead instruction (in order to make following expr-PRE happy), it forget to fabricate a leader-table entry for it as well. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191118 91177308-0d34-0410-b5e6-96231b3b80d8
19 lines
288 B
LLVM
19 lines
288 B
LLVM
; RUN: opt < %s -gvn -enable-pre -S | grep "b.pre"
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define i32 @main(i32 %p, i32 %q) {
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block1:
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%cmp = icmp eq i32 %p, %q
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br i1 %cmp, label %block2, label %block3
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block2:
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%a = add i32 %p, 1
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br label %block4
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block3:
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br label %block4
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block4:
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%b = add i32 %p, 1
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ret i32 %b
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}
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