| ; RUN: opt < %s -passes=loweratomic -S | FileCheck %s |
| |
| define i8 @cmpswap() { |
| ; CHECK-LABEL: @cmpswap( |
| %i = alloca i8 |
| %pair = cmpxchg ptr %i, i8 0, i8 42 monotonic monotonic |
| %j = extractvalue { i8, i1 } %pair, 0 |
| ; CHECK: [[OLDVAL:%[a-z0-9]+]] = load i8, ptr [[ADDR:%[a-z0-9]+]] |
| ; CHECK-NEXT: [[SAME:%[a-z0-9]+]] = icmp eq i8 [[OLDVAL]], 0 |
| ; CHECK-NEXT: [[TO_STORE:%[a-z0-9]+]] = select i1 [[SAME]], i8 42, i8 [[OLDVAL]] |
| ; CHECK-NEXT: store i8 [[TO_STORE]], ptr [[ADDR]] |
| ; CHECK-NEXT: [[TMP:%[a-z0-9]+]] = insertvalue { i8, i1 } poison, i8 [[OLDVAL]], 0 |
| ; CHECK-NEXT: [[RES:%[a-z0-9]+]] = insertvalue { i8, i1 } [[TMP]], i1 [[SAME]], 1 |
| ; CHECK-NEXT: [[VAL:%[a-z0-9]+]] = extractvalue { i8, i1 } [[RES]], 0 |
| ret i8 %j |
| ; CHECK: ret i8 [[VAL]] |
| } |
| |
| |
| define i8 @swap() { |
| ; CHECK-LABEL: @swap( |
| %i = alloca i8 |
| %j = atomicrmw xchg ptr %i, i8 42 monotonic |
| ; CHECK: [[INST:%[a-z0-9]+]] = load |
| ; CHECK-NEXT: store |
| ret i8 %j |
| ; CHECK: ret i8 [[INST]] |
| } |
| |
| |
| define i8 @swap_optnone() noinline optnone { |
| ; CHECK-LABEL: @swap_optnone( |
| %i = alloca i8 |
| %j = atomicrmw xchg ptr %i, i8 42 monotonic |
| ; CHECK: [[INST:%[a-z0-9]+]] = load |
| ; CHECK-NEXT: store |
| ret i8 %j |
| ; CHECK: ret i8 [[INST]] |
| } |
