atomic_ops.c
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// RUN: %clang_cc1 -triple x86_64 -emit-llvm %s \
// RUN: -o - | FileCheck -check-prefixes=CHECK,NATIVE %s
// RUN: %clang_cc1 -triple riscv32 -target-feature -a -emit-llvm %s \
// RUN: -o - | FileCheck -check-prefixes=CHECK,LIBCALL %s
void foo(int x)
{
_Atomic(int) i = 0;
_Atomic(short) j = 0;
// Check that multiply / divides on atomics produce a cmpxchg loop
i *= 2;
// NATIVE: mul nsw i32
// NATIVE: cmpxchg i32*
// LIBCALL: mul nsw i32
// LIBCALL: i1 @__atomic_compare_exchange(i32 4,
i /= 2;
// NATIVE: sdiv i32
// NATIVE: cmpxchg i32*
// LIBCALL: sdiv i32
// LIBCALL: i1 @__atomic_compare_exchange(i32 4,
j /= x;
// NATIVE: sdiv i32
// NATIVE: cmpxchg i16*
// LIBCALL: sdiv i32
// LIBCALL: i1 @__atomic_compare_exchange(i32 2,
}
// LIBCALL: declare void @__atomic_load(i32, i8*, i8*, i32) [[LC_ATTRS:#[0-9]+]]
// LIBCALL: declare i1 @__atomic_compare_exchange(i32, i8*, i8*, i8*, i32, i32) [[LC_ATTRS:#[0-9]+]]
extern _Atomic _Bool b;
_Bool bar() {
// NATIVE-LABEL: @bar
// NATIVE: %[[load:.*]] = load atomic i8, i8* @b seq_cst
// NATIVE: %[[tobool:.*]] = trunc i8 %[[load]] to i1
// NATIVE: ret i1 %[[tobool]]
// LIBCALL-LABEL: @bar
// LIBCALL: call void @__atomic_load(i32 1, i8* @b, i8* %atomic-temp, i32 5)
// LIBCALL: %[[load:.*]] = load i8, i8* %atomic-temp
// LIBCALL: %[[tobool:.*]] = trunc i8 %[[load]] to i1
// LIBCALL: ret i1 %[[tobool]]
return b;
}
extern _Atomic(_Complex int) x;
void baz(int y) {
// NATIVE-LABEL: @baz
// NATIVE: store atomic
// LIBCALL-LABEL: @baz
// LIBCALL: call void @__atomic_store
x += y;
}
// LIBCALL: declare void @__atomic_store(i32, i8*, i8*, i32) [[LC_ATTRS:#[0-9]+]]
_Atomic(int) compound_add(_Atomic(int) in) {
// CHECK-LABEL: @compound_add
// CHECK: [[OLD:%.*]] = atomicrmw add i32* {{.*}}, i32 5 seq_cst
// CHECK: [[NEW:%.*]] = add i32 [[OLD]], 5
// CHECK: ret i32 [[NEW]]
return (in += 5);
}
_Atomic(int) compound_sub(_Atomic(int) in) {
// CHECK-LABEL: @compound_sub
// CHECK: [[OLD:%.*]] = atomicrmw sub i32* {{.*}}, i32 5 seq_cst
// CHECK: [[NEW:%.*]] = sub i32 [[OLD]], 5
// CHECK: ret i32 [[NEW]]
return (in -= 5);
}
_Atomic(int) compound_xor(_Atomic(int) in) {
// CHECK-LABEL: @compound_xor
// CHECK: [[OLD:%.*]] = atomicrmw xor i32* {{.*}}, i32 5 seq_cst
// CHECK: [[NEW:%.*]] = xor i32 [[OLD]], 5
// CHECK: ret i32 [[NEW]]
return (in ^= 5);
}
_Atomic(int) compound_or(_Atomic(int) in) {
// CHECK-LABEL: @compound_or
// CHECK: [[OLD:%.*]] = atomicrmw or i32* {{.*}}, i32 5 seq_cst
// CHECK: [[NEW:%.*]] = or i32 [[OLD]], 5
// CHECK: ret i32 [[NEW]]
return (in |= 5);
}
_Atomic(int) compound_and(_Atomic(int) in) {
// CHECK-LABEL: @compound_and
// CHECK: [[OLD:%.*]] = atomicrmw and i32* {{.*}}, i32 5 seq_cst
// CHECK: [[NEW:%.*]] = and i32 [[OLD]], 5
// CHECK: ret i32 [[NEW]]
return (in &= 5);
}
_Atomic(int) compound_mul(_Atomic(int) in) {
// NATIVE-LABEL: @compound_mul
// NATIVE: cmpxchg i32* {{%.*}}, i32 {{%.*}}, i32 [[NEW:%.*]] seq_cst seq_cst
// NATIVE: ret i32 [[NEW]]
// LIBCALL-LABEL: @compound_mul
// LIBCALL: i1 @__atomic_compare_exchange(i32 4,
return (in *= 5);
}
// LIBCALL: [[LC_ATTRS]] = { nounwind willreturn }