| // RUN: %clang -O1 -fexperimental-new-pass-manager -fno-unroll-loops -S -o - %s -emit-llvm | FileCheck %s -check-prefix=CHECK-NEWPM |
| // RUN: %clang -O1 -fno-experimental-new-pass-manager -fno-unroll-loops -S -o - %s -emit-llvm | FileCheck %s -check-prefix=CHECK-OLDPM |
| extern int a[16]; |
| int b = 0; |
| int foo(void) { |
| #pragma unroll |
| for (int i = 0; i < 16; ++i) |
| a[i] = b += 2; |
| return b; |
| } |
| // Check br i1 to make sure that the loop is fully unrolled |
| // CHECK-LABEL-NEWPM: foo |
| // CHECK-NOT-NEWPM: br i1 |
| // CHECK-LABEL-OLDPM: foo |
| // CHECK-NOT-OLDPM: br i1 |
| |
| void Helper() { |
| const int *nodes[5]; |
| int num_active = 5; |
| |
| while (num_active) |
| #pragma clang loop unroll(full) |
| for (int i = 0; i < 5; ++i) |
| if (nodes[i]) |
| --num_active; |
| } |
| |
| // Check br i1 to make sure the loop is gone, there will still be a label branch for the infinite loop. |
| // CHECK-LABEL-NEWPM: Helper |
| // CHECK-NEWPM: br label |
| // CHECK-NEWPM-NOT: br i1 |
| // CHECK-NEWPM: br label |
| |
| // The old pass manager doesn't remove the while loop so check for 5 load i32*. |
| // CHECK-LABEL-OLDPM: Helper |
| // CHECK-OLDPM: br label |
| // CHECK-OLDPM: load i32* |
| // CHECK-OLDPM: load i32* |
| // CHECK-OLDPM: load i32* |
| // CHECK-OLDPM: load i32* |
| // CHECK-OLDPM: load i32* |
| // CHECK-OLDPM: ret |
