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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
21 lines
358 B
LLVM
21 lines
358 B
LLVM
; RUN: opt < %s -basicaa -gvn -S | grep "DEAD = phi i32 "
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define i32 @main(i32* %p, i32 %x, i32 %y) {
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block1:
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%z = load i32* %p
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%cmp = icmp eq i32 %x, %y
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br i1 %cmp, label %block2, label %block3
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block2:
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br label %block4
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block3:
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%b = bitcast i32 0 to i32
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store i32 %b, i32* %p
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br label %block4
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block4:
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%DEAD = load i32* %p
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ret i32 %DEAD
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}
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