xref: /aosp_15_r20/external/clang/test/CodeGen/atomic_ops.c (revision 67e74705e28f6214e480b399dd47ea732279e315) 
1*67e74705SXin Li // XFAIL: hexagon,sparc
2*67e74705SXin Li //        (due to not having native load atomic support)
3*67e74705SXin Li // RUN: %clang_cc1 -emit-llvm %s -o - | FileCheck %s
4*67e74705SXin Li // RUN: %clang_cc1 -triple mips-linux-gnu -emit-llvm %s -o - | FileCheck %s
5*67e74705SXin Li 
foo(int x)6*67e74705SXin Li void foo(int x)
7*67e74705SXin Li {
8*67e74705SXin Li   _Atomic(int) i = 0;
9*67e74705SXin Li   _Atomic(short) j = 0;
10*67e74705SXin Li   // Check that multiply / divides on atomics produce a cmpxchg loop
11*67e74705SXin Li   i *= 2;
12*67e74705SXin Li   // CHECK: mul nsw i32
13*67e74705SXin Li   // CHECK: {{(cmpxchg i32*|i1 @__atomic_compare_exchange\(i32 4,)}}
14*67e74705SXin Li   i /= 2;
15*67e74705SXin Li   // CHECK: sdiv i32
16*67e74705SXin Li   // CHECK: {{(cmpxchg i32*|i1 @__atomic_compare_exchange\(i32 4, )}}
17*67e74705SXin Li   j /= x;
18*67e74705SXin Li   // CHECK: sdiv i32
19*67e74705SXin Li   // CHECK: {{(cmpxchg i16*|i1 @__atomic_compare_exchange\(i32 2, )}}
20*67e74705SXin Li 
21*67e74705SXin Li }
22*67e74705SXin Li 
23*67e74705SXin Li extern _Atomic _Bool b;
24*67e74705SXin Li 
bar()25*67e74705SXin Li _Bool bar() {
26*67e74705SXin Li // CHECK-LABEL: @bar
27*67e74705SXin Li // CHECK: %[[load:.*]] = load atomic i8, i8* @b seq_cst
28*67e74705SXin Li // CHECK: %[[tobool:.*]] = trunc i8 %[[load]] to i1
29*67e74705SXin Li // CHECK: ret i1 %[[tobool]]
30*67e74705SXin Li   return b;
31*67e74705SXin Li }
32*67e74705SXin Li 
33*67e74705SXin Li extern _Atomic(_Complex int) x;
34*67e74705SXin Li 
baz(int y)35*67e74705SXin Li void baz(int y) {
36*67e74705SXin Li // CHECK-LABEL: @baz
37*67e74705SXin Li // CHECK: {{store atomic|call void @__atomic_store}}
38*67e74705SXin Li   x += y;
39*67e74705SXin Li }
40