| ; RUN: llc -march=hexagon < %s | FileCheck %s |
| ; |
| ; Test that the DAG ISel address tree balancing does not crash when nodes |
| ; are replaced (RAUW'd) during balancing. This is a regression test for |
| ; GitHub issue #64371 where use-after-poison occurred in balanceSubTree(). |
| ; |
| ; The specific pattern that triggers the issue involves nested adds used |
| ; in address calculations with null pointers, causing nodes to be replaced |
| ; during the balancing process. |
| |
| ; CHECK-LABEL: f: |
| ; CHECK: memb |
| ; CHECK: memb |
| define void @f(i32 %LGV1, ptr %RP) { |
| %G6 = getelementptr i32, ptr null, i32 %LGV1 |
| %B1 = add i32 %LGV1, %LGV1 |
| store i1 false, ptr %G6, align 1 |
| %B2 = add i32 %LGV1, %B1 |
| %G1 = getelementptr float, ptr %RP, i32 %B2 |
| store i1 false, ptr %G1, align 1 |
| ret void |
| } |
