llvm-project/clang/test/CodeGen/assume_attr.c

59 lines
1.8 KiB
C

// RUN: %clang_cc1 -emit-llvm -triple i386-linux-gnu %s -o - | FileCheck %s
// RUN: %clang_cc1 -x c -emit-pch -o %t %s
// RUN: %clang_cc1 -include-pch %t %s -emit-llvm -o - | FileCheck %s
// TODO: for "foo" and "bar", "after" is not added as it appears "after" the first use or definition respectively. There might be a way to allow that.
// CHECK: define{{.*}} void @bar() #0
// CHECK: define{{.*}} void @baz() #1
// CHECK: declare{{.*}} void @foo() #2
// CHECK: attributes #0
// CHECK-SAME: "llvm.assume"="bar:before1,bar:before2,bar:before3,bar:def1,bar:def2"
// CHECK: attributes #1
// CHECK-SAME: "llvm.assume"="baz:before1,baz:before2,baz:before3,baz:def1,baz:def2,baz:after"
// CHECK: attributes #2
// CHECK-SAME: "llvm.assume"="foo:before1,foo:before2,foo:before3"
#ifndef HEADER
#define HEADER
/// foo: declarations only
__attribute__((assume("foo:before1"))) void foo(void);
__attribute__((assume("foo:before2")))
__attribute__((assume("foo:before3"))) void
foo(void);
/// baz: static function declarations and a definition
__attribute__((assume("baz:before1"))) static void baz(void);
__attribute__((assume("baz:before2")))
__attribute__((assume("baz:before3"))) static void
baz(void);
// Definition
__attribute__((assume("baz:def1,baz:def2"))) static void baz(void) { foo(); }
__attribute__((assume("baz:after"))) static void baz(void);
/// bar: external function declarations and a definition
__attribute__((assume("bar:before1"))) void bar(void);
__attribute__((assume("bar:before2")))
__attribute__((assume("bar:before3"))) void
bar(void);
// Definition
__attribute__((assume("bar:def1,bar:def2"))) void bar(void) { baz(); }
__attribute__((assume("bar:after"))) void bar(void);
/// back to foo
__attribute__((assume("foo:after"))) void foo(void);
#endif