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; RUN: opt < %s -enable-loop-distribute -passes='loop-distribute,loop-mssa(simple-loop-unswitch<nontrivial>),loop-distribute' -o /dev/null -S -debug-pass-manager=verbose 2>&1 | FileCheck %s
; Running loop-distribute will result in LoopAccessAnalysis being required and
; cached in the LoopAnalysisManagerFunctionProxy.
;
; CHECK: Running analysis: LoopAccessAnalysis on Loop at depth 2 containing: %loop_a_inner<header><latch><exiting>
; Then simple-loop-unswitch is removing/replacing some loops (resulting in
; Loop objects used as key in the analyses cache is destroyed). So here we
; want to see that any analysis results cached on the destroyed loop is
; cleared. A special case here is that loop_a_inner is destroyed when
; unswitching the parent loop.
;
; The bug solved and verified by this test case was related to the
; SimpleLoopUnswitch not marking the Loop as removed, so we missed clearing
; the analysis caches.
;
; CHECK: Running pass: SimpleLoopUnswitchPass on Loop at depth 1 containing: %loop_begin<header>,%loop_b,%loop_b_inner,%loop_b_inner_exit,%loop_a,%loop_a_inner,%loop_a_inner_exit,%latch<latch><exiting>
; CHECK-NEXT: Clearing all analysis results for: loop_a_inner
; When running loop-distribute the second time we can see that loop_a_inner
; isn't analysed because the loop no longer exists (instead we find a new loop,
; loop_a_inner.us). This kind of verifies that it was correct to remove the
; loop_a_inner related analysis above.
;
; CHECK: Running analysis: LoopAccessAnalysis on Loop at depth 2 containing: %loop_a_inner.us<header><latch><exiting>
define i32 @test6(i1* %ptr, i1 %cond1, i32* %a.ptr, i32* %b.ptr) {
entry:
br label %loop_begin
loop_begin:
%v = load i1, i1* %ptr
br i1 %cond1, label %loop_a, label %loop_b
loop_a:
br label %loop_a_inner
loop_a_inner:
%va = load i1, i1* %ptr
%a = load i32, i32* %a.ptr
br i1 %va, label %loop_a_inner, label %loop_a_inner_exit
loop_a_inner_exit:
%a.lcssa = phi i32 [ %a, %loop_a_inner ]
br label %latch
loop_b:
br label %loop_b_inner
loop_b_inner:
%vb = load i1, i1* %ptr
%b = load i32, i32* %b.ptr
br i1 %vb, label %loop_b_inner, label %loop_b_inner_exit
loop_b_inner_exit:
%b.lcssa = phi i32 [ %b, %loop_b_inner ]
br label %latch
latch:
%ab.phi = phi i32 [ %a.lcssa, %loop_a_inner_exit ], [ %b.lcssa, %loop_b_inner_exit ]
br i1 %v, label %loop_begin, label %loop_exit
loop_exit:
%ab.lcssa = phi i32 [ %ab.phi, %latch ]
ret i32 %ab.lcssa
}
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