| ; RUN: opt -debug-pass-manager -aa-pipeline=basic-aa -passes='require<phi-values>,memcpyopt,instcombine' -disable-output < %s 2>&1 | FileCheck %s |
| |
| ; Check that phi values is not run when it's not already available, and that |
| ; basicaa is not freed after a pass that preserves CFG, as it preserves CFG. |
| |
| ; CHECK-DAG: Running analysis: PhiValuesAnalysis |
| ; CHECK-DAG: Running analysis: BasicAA |
| ; CHECK-DAG: Running analysis: MemorySSA |
| ; CHECK: Running pass: MemCpyOptPass |
| ; CHECK-NOT: Invalidating analysis |
| ; CHECK: Running pass: InstCombinePass |
| |
| target datalayout = "p:8:8-n8" |
| |
| declare void @otherfn(ptr) |
| declare i32 @__gxx_personality_v0(...) |
| declare void @llvm.lifetime.end.p0(i64, ptr nocapture) |
| @c = external global ptr, align 1 |
| |
| ; This function is one where if we didn't free basicaa after memcpyopt then the |
| ; usage of basicaa in instcombine would cause a segfault due to stale phi-values |
| ; results being used. |
| define void @fn(ptr %this, ptr %ptr) personality ptr @__gxx_personality_v0 { |
| entry: |
| %arr = alloca [4 x i8], align 8 |
| br i1 undef, label %then, label %if |
| |
| if: |
| br label %then |
| |
| then: |
| %phi = phi ptr [ %ptr, %if ], [ null, %entry ] |
| store i8 1, ptr %arr, align 8 |
| %load = load i64, ptr %phi, align 8 |
| %gep2 = getelementptr inbounds i8, ptr undef, i64 %load |
| %gep3 = getelementptr inbounds i8, ptr %gep2, i64 40 |
| invoke i32 undef(ptr undef) |
| to label %invoke unwind label %lpad |
| |
| invoke: |
| unreachable |
| |
| lpad: |
| landingpad { ptr, i32 } |
| catch ptr null |
| call void @otherfn(ptr nonnull %arr) |
| unreachable |
| } |
| |
| ; When running instcombine after memdep, the basicaa used by instcombine uses |
| ; the phivalues that memdep used. This would then cause a segfault due to |
| ; instcombine deleting a phi whose values had been cached. |
| define void @fn2() { |
| entry: |
| %a = alloca i8, align 1 |
| %0 = load ptr, ptr @c, align 1 |
| br label %for.cond |
| |
| for.cond: ; preds = %for.body, %entry |
| %d.0 = phi ptr [ %0, %entry ], [ null, %for.body ] |
| br i1 undef, label %for.body, label %for.cond.cleanup |
| |
| for.body: ; preds = %for.cond |
| store volatile i8 undef, ptr %a, align 1 |
| br label %for.cond |
| |
| for.cond.cleanup: ; preds = %for.cond |
| call void @llvm.lifetime.end.p0(i64 1, ptr %a) |
| %1 = load ptr, ptr %d.0, align 1 |
| store ptr %1, ptr @c, align 1 |
| ret void |
| } |