forked from OSchip/llvm-project
36 lines
1.2 KiB
C
36 lines
1.2 KiB
C
// RUN: %clang_cc1 -no-opaque-pointers -triple x86_64-apple-macosx10.7.0 %s -emit-llvm -o - | FileCheck %s
|
|
|
|
void t1(void) __attribute__((naked));
|
|
|
|
// Basic functionality check
|
|
// (Note that naked needs to imply noinline to work properly.)
|
|
// CHECK: define{{.*}} void @t1() [[NAKED_OPTNONE:#[0-9]+]] {
|
|
void t1(void)
|
|
{
|
|
}
|
|
|
|
// Make sure this doesn't explode in the verifier.
|
|
// (It doesn't really make sense, but it isn't invalid.)
|
|
// CHECK: define{{.*}} void @t2() [[NAKED:#[0-9]+]] {
|
|
__attribute((naked, always_inline)) void t2(void) {
|
|
}
|
|
|
|
// Make sure not to generate prolog or epilog for naked functions.
|
|
__attribute((naked)) void t3(int x) {
|
|
// CHECK: define{{.*}} void @t3(i32 noundef %0)
|
|
// CHECK-NOT: alloca
|
|
// CHECK-NOT: store
|
|
// CHECK: unreachable
|
|
}
|
|
|
|
// Make sure naked functions do not attempt to evaluate parameters with a
|
|
// variably-modified type. Naked functions get no prolog, so this evaluation
|
|
// should not take place.
|
|
__attribute__((naked)) void t4(int len, char x[len]) {
|
|
// CHECK: define{{.*}} void @t4(i32 noundef{{.*}}, i8* noundef{{.*}})
|
|
// CHECK: unreachable
|
|
}
|
|
|
|
// CHECK: attributes [[NAKED_OPTNONE]] = { naked noinline nounwind optnone{{.*}} }
|
|
// CHECK: attributes [[NAKED]] = { naked noinline nounwind{{.*}} }
|