maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/clang/test/CodeGen/ms-volatile.c

75 lines
2.2 KiB
C
Raw Normal View History

__declspec is not a core Clang language extension. Instead, require -fms-extensions or -fborland to enable the language extension. Note: __declspec is also temporarily enabled when compiling for a CUDA target because there are implementation details relying on __declspec(property) support currently. When those details change, __declspec should be disabled for CUDA targets. llvm-svn: 238238
2015-05-27 03:44:52 +08:00
// RUN: %clang_cc1 -triple i386-pc-win32 -fms-extensions -emit-llvm -fms-volatile -o - < %s | FileCheck %s
Revert "Revert r229082 for a bit, it caused PR22577." This reverts commit r229123. It was a red herring, the bug was present without r229082. llvm-svn: 229205
2015-02-14 09:35:12 +08:00
struct foo {
volatile int x;
};
struct bar {
int x;
};
typedef _Complex float __declspec(align(8)) baz;
void test1(struct foo *p, struct foo *q) {
*p = *q;
// CHECK-LABEL: @test1
// CHECK: load atomic volatile {{.*}} acquire
// CHECK: store atomic volatile {{.*}}, {{.*}} release
}
void test2(volatile int *p, volatile int *q) {
*p = *q;
// CHECK-LABEL: @test2
// CHECK: load atomic volatile {{.*}} acquire
// CHECK: store atomic volatile {{.*}}, {{.*}} release
}
void test3(struct foo *p, struct foo *q) {
p->x = q->x;
// CHECK-LABEL: @test3
// CHECK: load atomic volatile {{.*}} acquire
// CHECK: store atomic volatile {{.*}}, {{.*}} release
}
void test4(volatile struct foo *p, volatile struct foo *q) {
p->x = q->x;
// CHECK-LABEL: @test4
// CHECK: load atomic volatile {{.*}} acquire
// CHECK: store atomic volatile {{.*}}, {{.*}} release
}
void test5(volatile struct foo *p, volatile struct foo *q) {
*p = *q;
// CHECK-LABEL: @test5
// CHECK: load atomic volatile {{.*}} acquire
// CHECK: store atomic volatile {{.*}}, {{.*}} release
}
void test6(struct bar *p, struct bar *q) {
*p = *q;
// CHECK-LABEL: @test6
// CHECK-NOT: load atomic volatile {{.*}}
// CHECK-NOT: store atomic volatile {{.*}}, {{.*}}
}
void test7(volatile struct bar *p, volatile struct bar *q) {
*p = *q;
// CHECK-LABEL: @test7
// CHECK: load atomic volatile {{.*}} acquire
// CHECK: store atomic volatile {{.*}}, {{.*}} release
}
void test8(volatile double *p, volatile double *q) {
*p = *q;
// CHECK-LABEL: @test8
[MSVC Compat] Don't provide /volatile:ms semantics to types > pointer Volatile loads of type wider than a pointer get split by MSVC because the base x86 ISA doesn't provide loads which are wider than pointer width. LLVM assumes that it can emit an cmpxchg8b but this is problematic if the memory is in a CONST memory segment. Instead, provide behavior compatible with MSVC: split loads wider than a pointer. llvm-svn: 258506
2016-01-23 00:36:44 +08:00
// CHECK: load volatile {{.*}}
// CHECK: store volatile {{.*}}, {{.*}}
Revert "Revert r229082 for a bit, it caused PR22577." This reverts commit r229123. It was a red herring, the bug was present without r229082. llvm-svn: 229205
2015-02-14 09:35:12 +08:00
}
void test9(volatile baz *p, baz *q) {
*p = *q;
// CHECK-LABEL: @test9
// CHECK: store atomic volatile {{.*}}, {{.*}} release
}
[MSVC Compat] Don't provide /volatile:ms semantics to types > pointer Volatile loads of type wider than a pointer get split by MSVC because the base x86 ISA doesn't provide loads which are wider than pointer width. LLVM assumes that it can emit an cmpxchg8b but this is problematic if the memory is in a CONST memory segment. Instead, provide behavior compatible with MSVC: split loads wider than a pointer. llvm-svn: 258506
2016-01-23 00:36:44 +08:00
void test10(volatile long long *p, volatile long long *q) {
*p = *q;
// CHECK-LABEL: @test10
// CHECK: load volatile {{.*}}
// CHECK: store volatile {{.*}}, {{.*}}
}
void test11(volatile float *p, volatile float *q) {
*p = *q;
// CHECK-LABEL: @test11
// CHECK: load atomic volatile {{.*}} acquire
// CHECK: store atomic volatile {{.*}}, {{.*}} release
}