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llvm-project/clang/test/CodeGenCXX/call-with-static-chain.cpp

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Implement the __builtin_call_with_static_chain GNU extension. The extension has the following syntax: __builtin_call_with_static_chain(Call, Chain) where Call must be a function call expression and Chain must be of pointer type This extension performs a function call Call with a static chain pointer Chain passed to the callee in a designated register. This is useful for calling foreign language functions whose ABI uses static chain pointers (e.g. to implement closures). Differential Revision: http://reviews.llvm.org/D6332 llvm-svn: 224167
2014-12-13 07:41:25 +08:00
// RUN: %clang_cc1 -triple i386-unknown-unknown -emit-llvm -o - %s | FileCheck -check-prefix=CHECK32 %s
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck -check-prefix=CHECK64 %s
struct A {
long x, y;
};
struct B {
long x, y, z, w;
};
extern "C" {
int f1(A, A, A, A);
B f2(void);
_Complex float f3(void);
A &f4();
}
void test() {
A a;
[i386 ABI] expand small C like structs in C++, just like how we handle small C structs. This comes up when we have a function that takes a struct and is defined in a C++ file and used in a C file. Before this commit, we will generate byval for C++ and will expand the struct for C, thus causing difference at IR level. We will use bitcast of function type at the callsite, which causes the inliner to not inline the function. This commit changes how we handle small C like structs at IR level, but at backend, we should generate the same argument passing before and after the commit. Note that the condition for expanding is still over conservative. We should be able to expand type that is spelled with “class” and types that are not C-like. But this commit fixes the inconsistent argument passing between C/C++. Reviewed by John. rdar://20121030 llvm-svn: 234033
2015-04-04 02:10:29 +08:00
// CHECK32: call i32 bitcast (i32 (i32, i32, i32, i32, i32, i32, i32, i32)* @f1 to i32 (i8*, i32, i32, i32, i32, i32, i32, i32, i32)*)(i8* nest bitcast (i32 (i32, i32, i32, i32, i32, i32, i32, i32)* @f1 to i8*)
Implement the __builtin_call_with_static_chain GNU extension. The extension has the following syntax: __builtin_call_with_static_chain(Call, Chain) where Call must be a function call expression and Chain must be of pointer type This extension performs a function call Call with a static chain pointer Chain passed to the callee in a designated register. This is useful for calling foreign language functions whose ABI uses static chain pointers (e.g. to implement closures). Differential Revision: http://reviews.llvm.org/D6332 llvm-svn: 224167
2014-12-13 07:41:25 +08:00
// CHECK64: call i32 bitcast (i32 (i64, i64, i64, i64, i64, i64, %struct.A*)* @f1 to i32 (i8*, i64, i64, i64, i64, i64, i64, %struct.A*)*)(i8* nest bitcast (i32 (i64, i64, i64, i64, i64, i64, %struct.A*)* @f1 to i8*)
__builtin_call_with_static_chain(f1(a, a, a, a), f1);
[CodeGen] Add an alignment attribute to all sret parameters This fixes a miscompile when the parameter is actually underaligned. rdar://58316406 Differential revision: https://reviews.llvm.org/D74183
2020-03-25 00:36:19 +08:00
// CHECK32: call void bitcast (void (%struct.B*)* @f2 to void (%struct.B*, i8*)*)(%struct.B* sret align 4 %{{[0-9a-z]+}}, i8* nest bitcast (void (%struct.B*)* @f2 to i8*))
// CHECK64: call void bitcast (void (%struct.B*)* @f2 to void (%struct.B*, i8*)*)(%struct.B* sret align 8 %{{[0-9a-z]+}}, i8* nest bitcast (void (%struct.B*)* @f2 to i8*))
Implement the __builtin_call_with_static_chain GNU extension. The extension has the following syntax: __builtin_call_with_static_chain(Call, Chain) where Call must be a function call expression and Chain must be of pointer type This extension performs a function call Call with a static chain pointer Chain passed to the callee in a designated register. This is useful for calling foreign language functions whose ABI uses static chain pointers (e.g. to implement closures). Differential Revision: http://reviews.llvm.org/D6332 llvm-svn: 224167
2014-12-13 07:41:25 +08:00
__builtin_call_with_static_chain(f2(), f2);
// CHECK32: call i64 bitcast (i64 ()* @f3 to i64 (i8*)*)(i8* nest bitcast (i64 ()* @f3 to i8*))
// CHECK64: call <2 x float> bitcast (<2 x float> ()* @f3 to <2 x float> (i8*)*)(i8* nest bitcast (<2 x float> ()* @f3 to i8*))
__builtin_call_with_static_chain(f3(), f3);
// CHECK32: call dereferenceable(8) %struct.A* bitcast (%struct.A* ()* @f4 to %struct.A* (i8*)*)(i8* nest bitcast (%struct.A* ()* @f4 to i8*))
// CHECK64: call dereferenceable(16) %struct.A* bitcast (%struct.A* ()* @f4 to %struct.A* (i8*)*)(i8* nest bitcast (%struct.A* ()* @f4 to i8*))
__builtin_call_with_static_chain(f4(), f4);
}