region_exiting-domtree.ll
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; RUN: opt %loadPolly -polly-codegen -verify-dom-info -analyze < %s
; Verify that the DominatorTree is preserved correctly for the inserted
; %polly.stmt.exit.exit block, which serves as new exit block for the generated
; subregion. In particulat, it must be dominated by %polly.stmt.subregion.enter,
; the generated subregion's entry block.
define void @func(i32 %n, i32* noalias nonnull %A) {
entry:
br label %loop
loop:
%i = phi i32 [0, %entry], [%i.inc, %loop.inc]
%i.cmp = icmp slt i32 %i, %n
br i1 %i.cmp, label %body, label %return
body:
%skipcond = icmp slt i32 %i, 5
br i1 %skipcond, label %subregion.enter, label %subregion.skip
subregion.skip:
br label %exit
subregion.enter:
%sqr = mul i32 %i, %i
%cond = icmp eq i32 %sqr, 0
store i32 %i, i32* %A
br i1 %cond, label %subregion.true, label %subregion.false
subregion.true:
br label %exit
subregion.false:
br label %exit
exit:
br label %loop.inc
loop.inc:
%i.inc = add nuw nsw i32 %i, 1
br label %loop
return:
ret void
}