| ; 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 |
| } |