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1; Test that LICM correctly detects conflicting accesses to memory in deeply2; nested subloops. This works in the legacy PM due to a special retained map of3; alias information for inner loops, and in the new PM it is recomputed for each4; loop.5;6; RUN: opt -S -aa-pipeline=basic-aa -passes='require<opt-remark-emit>,loop-mssa(licm)' < %s | FileCheck %s7; RUN: opt -S -passes=licm < %s | FileCheck %s8 9define i32 @test(ptr %a, i64 %n.0, i64 %n.0.0, i64 %n.0.0.0, i64 %n.0.0.0.0) nounwind uwtable readonly {10; CHECK-LABEL: define i32 @test11entry:12 %b = alloca i3213 %c = alloca i3214 br label %l.0.header15; CHECK: %b = alloca i3216; CHECK: %c = alloca i3217; CHECK-NOT: load18; CHECK: br19 20l.0.header:21 %iv.0 = phi i64 [ %iv.0.next, %l.0.latch ], [ 0, %entry ]22 %iv.0.next = add i64 %iv.0, 123 %exitcond.0 = icmp eq i64 %iv.0.next, %n.024 %a.val = load i32, ptr %a25 store i32 %a.val, ptr %b26 %c.val = trunc i64 %iv.0 to i3227 store i32 %c.val, ptr %c28 br label %l.0.0.header29; CHECK: %[[AV:.*]] = load i32, ptr %a30; CHECK: store i32 %[[AV]], ptr %b31; CHECK: %[[CT:.*]] = trunc i64 {{.*}} to i3232; CHECK: store i32 %[[CT]], ptr %c33; CHECK: br34 35l.0.0.header:36 %iv.0.0 = phi i64 [ %iv.0.0.next, %l.0.0.latch ], [ 0, %l.0.header ]37 %iv.0.0.next = add i64 %iv.0.0, 138 %exitcond.0.0 = icmp eq i64 %iv.0.0.next, %n.0.039 br label %l.0.0.0.header40; CHECK: br41 42l.0.0.0.header:43 %iv.0.0.0 = phi i64 [ %iv.0.0.0.next, %l.0.0.0.header ], [ 0, %l.0.0.header ]44 %iv.0.0.0.next = add i64 %iv.0.0.0, 145 %exitcond.0.0.0 = icmp eq i64 %iv.0.0.0.next, %n.0.0.046 call void @llvm.memcpy.p0.p0.i64(ptr %a, ptr %c, i64 4, i1 false)47 call void @llvm.memcpy.p0.p0.i64(ptr %b, ptr %c, i64 4, i1 false)48 br i1 %exitcond.0.0.0, label %l.0.0.0.header, label %l.0.0.latch49; CHECK: call void @llvm.memcpy.{{.*}}(ptr %a, ptr %c, i64 450; CHECK: call void @llvm.memcpy.{{.*}}(ptr %b, ptr %c, i64 451; CHECK: br52 53l.0.0.latch:54 br i1 %exitcond.0.0, label %l.0.0.header, label %l.0.latch55; CHECK: br56 57l.0.latch:58 %b.val = load i32, ptr %b59 br i1 %exitcond.0, label %exit, label %l.0.header60; CHECK: %[[BV:.*]] = load i32, ptr %b61; CHECK: br62 63exit:64 %result.lcssa = phi i32 [ %b.val, %l.0.latch ]65 ret i32 %b.val66; CHECK: %[[LCSSA:.*]] = phi i32 [ %[[BV]], %{{.*}} ]67; CHECK: ret i32 %[[LCSSA]]68}69 70declare void @llvm.memcpy.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i1)71