| // REQUIRES: hexagon-registered-target |
| // RUN: %clang_cc1 -emit-llvm -O2 -o - -triple hexagon-unknown-elf %s | FileCheck %s |
| // This unit test validates that the store to "dst" variable needs to be eliminated. |
| |
| // CHECK: @brev_store_elimination_test1 |
| // CHECK: llvm.hexagon.L2.loadri.pbr |
| // CHECK-NOT: store |
| |
| int *brev_store_elimination_test1(int *ptr, int mod) { |
| int dst = 100; |
| return __builtin_brev_ldw(ptr, &dst, mod); |
| } |
| |
| // CHECK: @brev_store_elimination_test2 |
| // CHECK: llvm.hexagon.L2.loadri.pbr |
| // CHECK-NOT: store |
| extern int add(int a); |
| int brev_store_elimination_test2(int *ptr, int mod) { |
| int dst = 100; |
| __builtin_brev_ldw(ptr, &dst, mod); |
| return add(dst); |
| } |
| |
| // CHECK: @brev_store_elimination_test3 |
| // CHECK: llvm.hexagon.L2.loadri.pbr |
| // CHECK-NOT: store |
| int brev_store_elimination_test3(int *ptr, int mod, int inc) { |
| int dst = 100; |
| for (int i = 0; i < inc; ++i) { |
| __builtin_brev_ldw(ptr, &dst, mod); |
| dst = add(dst); |
| } |
| return dst; |
| } |
| |
| // brev_store_elimination_test4 validates the fact that we are not deleting the |
| // stores if the value is passed by reference later. |
| // CHECK: @brev_store_elimination_test4 |
| // CHECK: llvm.hexagon.L2.loadri.pbr |
| // CHECK: store |
| extern int sub(int *a); |
| int brev_store_elimination_test4(int *ptr, int mod) { |
| int dst = 100; |
| __builtin_brev_ldw(ptr, &dst, mod); |
| return sub(&dst); |
| } |
