| ; RUN: opt < %s -passes=lint -disable-output 2>&1 | FileCheck %s |
| |
| declare void @f1(ptr noalias readonly, ptr) |
| |
| define void @f2(ptr %a) { |
| entry: |
| call void @f1(ptr %a, ptr %a) |
| ret void |
| } |
| |
| ; Lint should complain about us passing %a to both arguments, since the noalias |
| ; argument may depend on writes to the other. |
| ; CHECK: Unusual: noalias argument aliases another argument |
| ; CHECK-NEXT: call void @f1(ptr %a, ptr %a) |
| |
| declare void @f3(ptr noalias, ptr readonly) |
| |
| define void @f4(ptr %a) { |
| entry: |
| call void @f3(ptr %a, ptr %a) |
| ret void |
| } |
| |
| ; Lint should complain about us passing %a to both arguments, since writes to |
| ; the noalias argument may cause a dependency for the other. |
| ; CHECK: Unusual: noalias argument aliases another argument |
| ; CHECK-NEXT: call void @f3(ptr %a, ptr %a) |
| |
| declare void @f5(ptr noalias readonly, ptr readonly) |
| |
| define void @f6(ptr %a) { |
| entry: |
| call void @f5(ptr %a, ptr %a) |
| ret void |
| } |
| |
| ; Lint should not complain about passing %a to both arguments even if one is |
| ; noalias, since they are both readonly and thus have no dependence. |
| ; CHECK-NOT: Unusual: noalias argument aliases another argument |
| ; CHECK-NOT: call void @f5(ptr %a, ptr %a) |