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51e36a66fe
A first real transformation that didn't already knew how to do that, but it's pretty tame - either change successor of all the predecessors of a block and carefully delay deletion of the block until afterwards the DomTree updates are appled, or add a successor to the block. There wasn't a great test coverage for this, so i added extra, to be sure.
19 lines
499 B
LLVM
19 lines
499 B
LLVM
; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -disable-output
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define i1 @foo() personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
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%X = invoke i1 @foo( )
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to label %N unwind label %F ; <i1> [#uses=1]
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F: ; preds = %0
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%val = landingpad { i8*, i32 }
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catch i8* null
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ret i1 false
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N: ; preds = %0
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br i1 %X, label %A, label %B
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A: ; preds = %N
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ret i1 true
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B: ; preds = %N
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ret i1 true
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}
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declare i32 @__gxx_personality_v0(...)
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