diff options
Diffstat (limited to 'test/CodeGen/assign.c')
| -rw-r--r-- | test/CodeGen/assign.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/test/CodeGen/assign.c b/test/CodeGen/assign.c new file mode 100644 index 0000000..eab3d35 --- /dev/null +++ b/test/CodeGen/assign.c @@ -0,0 +1,32 @@ +// RUN: %clang_cc1 -triple x86_64 -emit-llvm -o - %s | FileCheck %s + +// Check that we don't generate unnecessary reloads. +// +// CHECK: define void @f0() +// CHECK: [[x_0:%.*]] = alloca i32, align 4 +// CHECK-NEXT: [[y_0:%.*]] = alloca i32, align 4 +// CHECK-NEXT: store i32 1, i32* [[x_0]] +// CHECK-NEXT: store i32 1, i32* [[x_0]] +// CHECK-NEXT: store i32 1, i32* [[y_0]] +// CHECK: } +void f0() { + int x, y; + x = 1; + y = (x = 1); +} + +// Check that we do generate reloads for volatile access. +// +// CHECK: define void @f1() +// CHECK: [[x_1:%.*]] = alloca i32, align 4 +// CHECK-NEXT: [[y_1:%.*]] = alloca i32, align 4 +// CHECK-NEXT: volatile store i32 1, i32* [[x_1]] +// CHECK-NEXT: volatile store i32 1, i32* [[x_1]] +// CHECK-NEXT: [[tmp_1:%.*]] = volatile load i32* [[x_1]] +// CHECK-NEXT: volatile store i32 [[tmp_1]], i32* [[y_1]] +// CHECK: } +void f1() { + volatile int x, y; + x = 1; + y = (x = 1); +} |
