; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4 ; RUN: llc -mtriple hexagon-- -o - %s | FileCheck %s ; Reproducer for https://github.com/llvm/llvm-project/issues/89060 ; ; Problem was a bug in argument copy elison. Given that the %alloca is ; eliminated, the same frame index will be used for accessing %alloca and %a ; on the fixed stack. Care must be taken when setting up ; MachinePointerInfo/MemOperands for those accesses to either make sure that ; we always refer to the fixed stack slot the same way (not using the ; ir.alloca name), or make sure that we still detect that they alias each ; other if using different kinds of MemOperands to identify the same fixed ; stack entry. ; define i32 @f(i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 %q1, i32 %a, i32 %q2) { ; CHECK-LABEL: f: ; CHECK: .cfi_startproc ; CHECK-NEXT: // %bb.0: ; CHECK-NEXT: { ; CHECK-NEXT: r0 = memw(r29+#36) ; CHECK-NEXT: r1 = memw(r29+#28) ; CHECK-NEXT: } ; CHECK-NEXT: { ; CHECK-NEXT: r0 = sub(r1,r0) ; CHECK-NEXT: r2 = memw(r29+#32) ; CHECK-NEXT: memw(r29+#32) = ##666 ; CHECK-NEXT: } ; CHECK-NEXT: { ; CHECK-NEXT: r0 = xor(r0,r2) ; CHECK-NEXT: jumpr r31 ; CHECK-NEXT: } %alloca = alloca i32 store i32 %a, ptr %alloca ; Should be elided. store i32 666, ptr %alloca %x = sub i32 %q1, %q2 %y = xor i32 %x, %a ; Results in a load of %a from fixed stack. ; Using same frame index as elided %alloca. ret i32 %y }