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
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
// RUN: %clang_cc1 -emit-llvm < %s | FileCheck %s
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void __attribute__((fastcall)) f1(void);
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void __attribute__((stdcall)) f2(void);
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void __attribute__((thiscall)) f3(void);
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void __attribute__((fastcall)) f4(void) {
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// CHECK: define x86_fastcallcc void @f4()
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f1();
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// CHECK: call x86_fastcallcc void @f1()
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}
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void __attribute__((stdcall)) f5(void) {
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// CHECK: define x86_stdcallcc void @f5()
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f2();
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// CHECK: call x86_stdcallcc void @f2()
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}
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void __attribute__((thiscall)) f6(void) {
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// CHECK: define x86_thiscallcc void @f6()
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f3();
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// CHECK: call x86_thiscallcc void @f3()
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}
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// PR5280
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void (__attribute__((fastcall)) *pf1)(void) = f1;
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void (__attribute__((stdcall)) *pf2)(void) = f2;
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void (__attribute__((thiscall)) *pf3)(void) = f3;
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void (__attribute__((fastcall)) *pf4)(void) = f4;
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void (__attribute__((stdcall)) *pf5)(void) = f5;
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void (__attribute__((thiscall)) *pf6)(void) = f6;
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int main(void) {
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f4(); f5(); f6();
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// CHECK: call x86_fastcallcc void @f4()
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// CHECK: call x86_stdcallcc void @f5()
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// CHECK: call x86_thiscallcc void @f6()
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pf1(); pf2(); pf3(); pf4(); pf5(); pf6();
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// CHECK: call x86_fastcallcc void %{{.*}}()
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// CHECK: call x86_stdcallcc void %{{.*}}()
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// CHECK: call x86_thiscallcc void %{{.*}}()
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// CHECK: call x86_fastcallcc void %{{.*}}()
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// CHECK: call x86_stdcallcc void %{{.*}}()
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// CHECK: call x86_thiscallcc void %{{.*}}()
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return 0;
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}
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// PR7117
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void __attribute((stdcall)) f7(foo) int foo; {}
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void f8(void) {
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f7(0);
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// CHECK: call x86_stdcallcc void @f7(i32 0)
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}
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