1; RUN: opt -debug-pass-manager -aa-pipeline=basic-aa -passes='require<phi-values>,memcpyopt,instcombine' -disable-output < %s 2>&1 | FileCheck %s 2 3; Check that phi values is not run when it's not already available, and that 4; basicaa is not freed after a pass that preserves CFG, as it preserves CFG. 5 6; CHECK-DAG: Running analysis: PhiValuesAnalysis 7; CHECK-DAG: Running analysis: BasicAA 8; CHECK-DAG: Running analysis: MemorySSA 9; CHECK: Running pass: MemCpyOptPass 10; CHECK-NOT: Invalidating analysis 11; CHECK: Running pass: InstCombinePass 12 13target datalayout = "p:8:8-n8" 14 15declare void @otherfn(ptr) 16declare i32 @__gxx_personality_v0(...) 17declare void @llvm.lifetime.end.p0(i64, ptr nocapture) 18@c = external global ptr, align 1 19 20; This function is one where if we didn't free basicaa after memcpyopt then the 21; usage of basicaa in instcombine would cause a segfault due to stale phi-values 22; results being used. 23define void @fn(ptr %this, ptr %ptr, i1 %arg) personality ptr @__gxx_personality_v0 { 24entry: 25 %arr = alloca [4 x i8], align 8 26 br i1 %arg, label %then, label %if 27 28if: 29 br label %then 30 31then: 32 %phi = phi ptr [ %ptr, %if ], [ null, %entry ] 33 store i8 1, ptr %arr, align 8 34 %load = load i64, ptr %phi, align 8 35 %gep2 = getelementptr inbounds i8, ptr undef, i64 %load 36 %gep3 = getelementptr inbounds i8, ptr %gep2, i64 40 37 invoke i32 undef(ptr undef) 38 to label %invoke unwind label %lpad 39 40invoke: 41 unreachable 42 43lpad: 44 landingpad { ptr, i32 } 45 catch ptr null 46 call void @otherfn(ptr nonnull %arr) 47 unreachable 48} 49 50; When running instcombine after memdep, the basicaa used by instcombine uses 51; the phivalues that memdep used. This would then cause a segfault due to 52; instcombine deleting a phi whose values had been cached. 53define void @fn2(i1 %arg) { 54entry: 55 %a = alloca i8, align 1 56 %0 = load ptr, ptr @c, align 1 57 br label %for.cond 58 59for.cond: ; preds = %for.body, %entry 60 %d.0 = phi ptr [ %0, %entry ], [ null, %for.body ] 61 br i1 %arg, label %for.body, label %for.cond.cleanup 62 63for.body: ; preds = %for.cond 64 store volatile i8 undef, ptr %a, align 1 65 br label %for.cond 66 67for.cond.cleanup: ; preds = %for.cond 68 call void @llvm.lifetime.end.p0(i64 1, ptr %a) 69 %1 = load ptr, ptr %d.0, align 1 70 store ptr %1, ptr @c, align 1 71 ret void 72} 73