| ; This test exercises that we don't corrupt a loop-analysis when running loop |
| ; unrolling in a way that deletes a loop. To do that, we first ensure the |
| ; analysis is cached, then unroll the loop (deleting it) and make sure that the |
| ; next function doesn't get a cache "hit" for this stale analysis result. |
| ; |
| ; RUN: opt -S -passes='require<access-info>,loop-unroll,print<access-info>' -debug-pass-manager < %s 2>&1 | FileCheck %s |
| ; |
| ; CHECK: Running pass: RequireAnalysisPass<{{.*}}LoopAccessAnalysis |
| ; CHECK: Running analysis: LoopAnalysis |
| ; CHECK: Running pass: LoopUnrollPass |
| ; CHECK: Invalidating analysis: LoopAccessAnalysis on test |
| ; CHECK: Running pass: LoopAccessInfoPrinterPass |
| ; CHECK: Running analysis: LoopAccessAnalysis on test |
| ; CHECK: Loop access info in function 'test': |
| ; CHECK: inner1.header: |
| |
| ; CHECK: inner1.header.1: |
| |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| define void @test(i32 %inner1.count) { |
| ; CHECK-LABEL: define void @test( |
| bb: |
| br label %outer.ph |
| |
| outer.ph: |
| br label %outer.header |
| |
| outer.header: |
| %outer.i = phi i32 [ 0, %outer.ph ], [ %outer.i.next, %outer.latch ] |
| br label %inner1.ph |
| |
| inner1.ph: |
| br label %inner1.header |
| |
| inner1.header: |
| %inner1.i = phi i32 [ 0, %inner1.ph ], [ %inner1.i.next, %inner1.header ] |
| %inner1.i.next = add i32 %inner1.i, 1 |
| %inner1.cond = icmp eq i32 %inner1.i, %inner1.count |
| br i1 %inner1.cond, label %inner1.exit, label %inner1.header |
| ; We should have two unrolled copies of this loop and nothing else. |
| ; |
| ; CHECK-NOT: icmp eq |
| ; CHECK-NOT: br i1 |
| ; CHECK: %[[COND1:.*]] = icmp eq i32 %{{.*}}, %inner1.count |
| ; CHECK: br i1 %[[COND1]], |
| ; CHECK-NOT: icmp eq |
| ; CHECK-NOT: br i1 |
| ; CHECK: %[[COND2:.*]] = icmp eq i32 %{{.*}}, %inner1.count |
| ; CHECK: br i1 %[[COND2]], |
| ; CHECK-NOT: icmp eq |
| ; CHECK-NOT: br i1 |
| |
| |
| inner1.exit: |
| br label %inner2.ph |
| |
| inner2.ph: |
| br label %inner2.header |
| |
| inner2.header: |
| %inner2.i = phi i32 [ 0, %inner2.ph ], [ %inner2.i.next, %inner2.header ] |
| %inner2.i.next = add i32 %inner2.i, 1 |
| %inner2.cond = icmp eq i32 %inner2.i, 4 |
| br i1 %inner2.cond, label %inner2.exit, label %inner2.header |
| |
| inner2.exit: |
| br label %outer.latch |
| |
| outer.latch: |
| %outer.i.next = add i32 %outer.i, 1 |
| %outer.cond = icmp eq i32 %outer.i.next, 2 |
| br i1 %outer.cond, label %outer.exit, label %outer.header |
| |
| outer.exit: |
| br label %exit |
| |
| exit: |
| ret void |
| } |