1; RUN: opt -debug-pass=Executions -phi-values -memcpyopt -instcombine -disable-output < %s -enable-new-pm=0 2>&1 | FileCheck %s -check-prefixes=CHECK,CHECK-MEMCPY 2; RUN: opt -debug-pass=Executions -memdep -instcombine -disable-output < %s -enable-new-pm=0 2>&1 | FileCheck %s -check-prefix=CHECK 3; RUN: opt -debug-pass-manager -aa-pipeline=basic-aa -passes=memcpyopt,instcombine -disable-output < %s 2>&1 | FileCheck %s -check-prefixes=NPM 4 5; Check that phi values is not run when it's not already available, and that 6; basicaa is not freed after a pass that preserves CFG, as it preserves CFG. 7 8; CHECK: Executing Pass 'Phi Values Analysis' 9; CHECK: Executing Pass 'Basic Alias Analysis (stateless AA impl)' 10; CHECK: Executing Pass 'Memory Dependence Analysis' 11; CHECK-MEMCPY: Executing Pass 'MemCpy Optimization' 12; CHECK-MEMCPY-DAG: Freeing Pass 'MemCpy Optimization' 13; CHECK-DAG: Freeing Pass 'Memory Dependence Analysis' 14; CHECK-DAG: Freeing Pass 'Phi Values Analysis' 15; CHECK-NOT: Executing Pass 'Phi Values Analysis' 16; CHECK-NOT: Executing Pass 'Basic Alias Analysis (stateless AA impl)' 17; CHECK: Executing Pass 'Combine redundant instructions' 18 19; NPM-DAG: Running analysis: PhiValuesAnalysis 20; NPM-DAG: Running analysis: BasicAA 21; NPM-DAG: Running analysis: MemoryDependenceAnalysis 22; NPM: Running pass: MemCpyOptPass 23; NPM-NOT: Invalidating analysis 24; NPM: Running pass: InstCombinePass 25 26target datalayout = "p:8:8-n8" 27 28declare void @otherfn([4 x i8]*) 29declare i32 @__gxx_personality_v0(...) 30declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) 31@c = external global i8*, align 1 32 33; This function is one where if we didn't free basicaa after memcpyopt then the 34; usage of basicaa in instcombine would cause a segfault due to stale phi-values 35; results being used. 36define void @fn(i8* %this, i64* %ptr) personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) { 37entry: 38 %arr = alloca [4 x i8], align 8 39 %gep1 = getelementptr inbounds [4 x i8], [4 x i8]* %arr, i64 0, i32 0 40 br i1 undef, label %then, label %if 41 42if: 43 br label %then 44 45then: 46 %phi = phi i64* [ %ptr, %if ], [ null, %entry ] 47 store i8 1, i8* %gep1, align 8 48 %load = load i64, i64* %phi, align 8 49 %gep2 = getelementptr inbounds i8, i8* undef, i64 %load 50 %gep3 = getelementptr inbounds i8, i8* %gep2, i64 40 51 invoke i32 undef(i8* undef) 52 to label %invoke unwind label %lpad 53 54invoke: 55 unreachable 56 57lpad: 58 landingpad { i8*, i32 } 59 catch i8* null 60 call void @otherfn([4 x i8]* nonnull %arr) 61 unreachable 62} 63 64; When running instcombine after memdep, the basicaa used by instcombine uses 65; the phivalues that memdep used. This would then cause a segfault due to 66; instcombine deleting a phi whose values had been cached. 67define void @fn2() { 68entry: 69 %a = alloca i8, align 1 70 %0 = load i8*, i8** @c, align 1 71 %1 = bitcast i8* %0 to i8** 72 br label %for.cond 73 74for.cond: ; preds = %for.body, %entry 75 %d.0 = phi i8** [ %1, %entry ], [ null, %for.body ] 76 br i1 undef, label %for.body, label %for.cond.cleanup 77 78for.body: ; preds = %for.cond 79 store volatile i8 undef, i8* %a, align 1 80 br label %for.cond 81 82for.cond.cleanup: ; preds = %for.cond 83 call void @llvm.lifetime.end.p0i8(i64 1, i8* %a) 84 %2 = load i8*, i8** %d.0, align 1 85 store i8* %2, i8** @c, align 1 86 ret void 87} 88