cbc038a6c3
if the definition has a non-variadic prototype with compatible parameters. Therefore, the default rule for such calls must be to use a non-variadic convention. Achieve this by casting the callee to the function type with which it is required to be compatible, unless the target specifically opts out and insists that unprototyped calls should use the variadic rules. The only case of that I'm aware of is the x86-64 convention, which passes arguments the same way in both cases but also sets a small amount of extra information; here we seek to maintain compatibility with GCC, which does set this when calling an unprototyped function. Addresses PR10810 and PR10713. llvm-svn: 140241
68 lines
1.4 KiB
C
68 lines
1.4 KiB
C
// RUN: %clang_cc1 %s -triple i386-unknown-unknown -emit-llvm -o - -verify | FileCheck %s
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int g();
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int foo(int i) {
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return g(i);
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}
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int g(int i) {
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return g(i);
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}
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// rdar://6110827
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typedef void T(void);
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void test3(T f) {
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f();
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}
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int a(int);
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int a() {return 1;}
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void f0() {}
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// CHECK: define void @f0()
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void f1();
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void f2(void) {
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// CHECK: call void bitcast (void ()* @f1 to void (i32, i32, i32)*)(i32 1, i32 2, i32 3)
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f1(1, 2, 3);
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}
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// CHECK: define void @f1()
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void f1() {}
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// CHECK: define {{.*}} @f3{{\(\)|\(.*sret.*\)}}
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struct foo { int X, Y, Z; } f3() {
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while (1) {}
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}
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// PR4423 - This shouldn't crash in codegen
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void f4() {}
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void f5() { f4(42); } //expected-warning {{too many arguments}}
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// Qualifiers on parameter types shouldn't make a difference.
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static void f6(const float f, const float g) {
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}
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void f7(float f, float g) {
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f6(f, g);
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// CHECK: define void @f7(float{{.*}}, float{{.*}})
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// CHECK: call void @f6(float{{.*}}, float{{.*}})
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}
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// PR6911 - incomplete function types
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struct Incomplete;
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void f8_callback(struct Incomplete);
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void f8_user(void (*callback)(struct Incomplete));
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void f8_test() {
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f8_user(&f8_callback);
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// CHECK: define void @f8_test()
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// CHECK: call void @f8_user({{.*}}* bitcast (void ()* @f8_callback to {{.*}}*))
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// CHECK: declare void @f8_user({{.*}}*)
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// CHECK: declare void @f8_callback()
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}
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// PR10204: don't crash
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static void test9_helper(void) {}
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void test9() {
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(void) test9_helper;
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}
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