b43b77ff9b
And that exposes that a number of tests don't *actually* manage to maintain DomTree validity, which is inline with my observations. Once again, SimlifyCFG pass currently does not require/preserve DomTree by default, so this is effectively NFC.
29 lines
783 B
LLVM
29 lines
783 B
LLVM
; RUN: opt < %s -simplifycfg -S | \
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; RUN: not grep "icmp eq"
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; Check that simplifycfg deletes a dead 'seteq' instruction when it
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; folds a conditional branch into a switch instruction.
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declare void @foo()
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declare void @bar()
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define void @testcfg(i32 %V) {
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%C = icmp eq i32 %V, 18 ; <i1> [#uses=1]
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%D = icmp eq i32 %V, 180 ; <i1> [#uses=1]
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%E = or i1 %C, %D ; <i1> [#uses=1]
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br i1 %E, label %L1, label %Sw
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Sw: ; preds = %0
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switch i32 %V, label %L1 [
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i32 15, label %L2
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i32 16, label %L2
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]
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L1: ; preds = %Sw, %0
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call void @foo( )
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ret void
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L2: ; preds = %Sw, %Sw
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call void @bar( )
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ret void
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}
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