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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt -passes=licm < %s -S | FileCheck %s3; RUN: opt -aa-pipeline=basic-aa -passes='require<aa>,require<target-ir>,require<scalar-evolution>,require<opt-remark-emit>,loop-mssa(licm)' < %s -S | FileCheck %s4 5define void @test1(i1 %cond, ptr %ptr) {6; CHECK-LABEL: @test1(7; CHECK-NEXT: entry:8; CHECK-NEXT: [[TMP0:%.*]] = call ptr @llvm.invariant.start.p0(i64 4, ptr [[PTR:%.*]])9; CHECK-NEXT: [[VAL:%.*]] = load i32, ptr [[PTR]], align 410; CHECK-NEXT: br label [[LOOP:%.*]]11; CHECK: loop:12; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_INC:%.*]], [[LOOP]] ]13; CHECK-NEXT: [[X_INC]] = add i32 [[X]], [[VAL]]14; CHECK-NEXT: br label [[LOOP]]15;16 17entry:18 br label %loop19 20loop:21 %x = phi i32 [ 0, %entry ], [ %x.inc, %loop ]22 call ptr @llvm.invariant.start.p0(i64 4, ptr %ptr)23 %val = load i32, ptr %ptr24 %x.inc = add i32 %x, %val25 br label %loop26}27 28;; despite the loop varying invariant.start, we should be29;; able to hoist the load30define void @test2(i1 %cond, ptr %ptr) {31; CHECK-LABEL: @test2(32; CHECK-NEXT: entry:33; CHECK-NEXT: [[VAL:%.*]] = load i32, ptr [[PTR:%.*]], align 434; CHECK-NEXT: br label [[LOOP:%.*]]35; CHECK: loop:36; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_INC:%.*]], [[LOOP]] ]37; CHECK-NEXT: [[PIV:%.*]] = getelementptr i32, ptr [[PTR]], i32 [[X]]38; CHECK-NEXT: [[TMP0:%.*]] = call ptr @llvm.invariant.start.p0(i64 4, ptr [[PIV]])39; CHECK-NEXT: [[X_INC]] = add i32 [[X]], [[VAL]]40; CHECK-NEXT: br label [[LOOP]]41;42entry:43 br label %loop44 45loop:46 %x = phi i32 [ 0, %entry ], [ %x.inc, %loop ]47 %piv = getelementptr i32, ptr %ptr, i32 %x48 call ptr @llvm.invariant.start.p0(i64 4, ptr %piv)49 %val = load i32, ptr %ptr50 %x.inc = add i32 %x, %val51 br label %loop52}53 54define void @test3(i1 %cond, ptr %ptr) {55; CHECK-LABEL: @test3(56; CHECK-NEXT: entry:57; CHECK-NEXT: [[TMP0:%.*]] = call ptr @llvm.invariant.start.p0(i64 4, ptr [[PTR:%.*]])58; CHECK-NEXT: [[VAL:%.*]] = load i32, ptr [[PTR]], align 459; CHECK-NEXT: [[P2:%.*]] = getelementptr i32, ptr [[PTR]], i32 160; CHECK-NEXT: br label [[LOOP:%.*]]61; CHECK: loop:62; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_INC:%.*]], [[LOOP]] ]63; CHECK-NEXT: store volatile i32 0, ptr [[P2]], align 464; CHECK-NEXT: [[X_INC]] = add i32 [[X]], [[VAL]]65; CHECK-NEXT: br label [[LOOP]]66;67entry:68 br label %loop69 70loop:71 %x = phi i32 [ 0, %entry ], [ %x.inc, %loop ]72 call ptr @llvm.invariant.start.p0(i64 4, ptr %ptr)73 %val = load i32, ptr %ptr74 %p2 = getelementptr i32, ptr %ptr, i32 175 store volatile i32 0, ptr %p276 %x.inc = add i32 %x, %val77 br label %loop78}79 80; can't hoist due to init in loop, only well defined if loop exits81; on first iteration, but we don't bother checking for that currently82define void @test4(i1 %cond, ptr %ptr) {83; CHECK-LABEL: @test4(84; CHECK-NEXT: entry:85; CHECK-NEXT: br label [[LOOP:%.*]]86; CHECK: loop:87; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_INC:%.*]], [[LOOP]] ]88; CHECK-NEXT: store i32 0, ptr [[PTR:%.*]], align 489; CHECK-NEXT: [[TMP0:%.*]] = call ptr @llvm.invariant.start.p0(i64 4, ptr [[PTR]])90; CHECK-NEXT: [[X_INC]] = add i32 [[X]], 091; CHECK-NEXT: br label [[LOOP]]92;93entry:94 br label %loop95 96loop:97 %x = phi i32 [ 0, %entry ], [ %x.inc, %loop ]98 store i32 0, ptr %ptr99 call ptr @llvm.invariant.start.p0(i64 4, ptr %ptr)100 %val = load i32, ptr %ptr101 %x.inc = add i32 %x, %val102 br label %loop103}104 105; don't try to reason about scopes106define void @test5(i1 %cond, ptr %ptr) {107; CHECK-LABEL: @test5(108; CHECK-NEXT: entry:109; CHECK-NEXT: br label [[LOOP:%.*]]110; CHECK: loop:111; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_INC:%.*]], [[LOOP]] ]112; CHECK-NEXT: store i32 0, ptr [[PTR:%.*]], align 4113; CHECK-NEXT: [[SCOPE:%.*]] = call ptr @llvm.invariant.start.p0(i64 4, ptr [[PTR]])114; CHECK-NEXT: [[VAL:%.*]] = load i32, ptr [[PTR]], align 4115; CHECK-NEXT: call void @llvm.invariant.end.p0(ptr [[SCOPE]], i64 4, ptr [[PTR]])116; CHECK-NEXT: [[X_INC]] = add i32 [[X]], [[VAL]]117; CHECK-NEXT: br label [[LOOP]]118;119entry:120 br label %loop121 122loop:123 %x = phi i32 [ 0, %entry ], [ %x.inc, %loop ]124 store i32 0, ptr %ptr125 %scope = call ptr @llvm.invariant.start.p0(i64 4, ptr %ptr)126 %val = load i32, ptr %ptr127 call void @llvm.invariant.end.p0(ptr %scope, i64 4, ptr %ptr)128 %x.inc = add i32 %x, %val129 br label %loop130}131 132declare ptr @llvm.invariant.start.p0(i64, ptr)133declare void @llvm.invariant.end.p0(ptr, i64, ptr)134