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e78333a010
Functions using stdcall, fastcall, or vectorcall with C linkage mangle in the size of the parameter pack. Calculating the size of the pack requires the parameter types to complete, which may require template instantiation. Previously, we would crash during IRgen when requesting the size of incomplete or uninstantiated types, as in this reduced example: struct Foo; void __fastcall bar(struct Foo o); void (__fastcall *fp)(struct Foo) = &bar; Reported in Chromium here: https://crbug.com/971245 Differential Revision: https://reviews.llvm.org/D62975 llvm-svn: 363000
54 lines
1.9 KiB
C
54 lines
1.9 KiB
C
// RUN: %clang_cc1 -fsyntax-only -fms-extensions -verify -triple i686-pc-win32 %s
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// RUN: %clang_cc1 -fsyntax-only -fms-extensions -verify -triple x86_64-pc-win32 %s
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// RUN: %clang_cc1 -x c++ -fsyntax-only -fms-extensions -verify -triple i686-pc-win32 %s
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// RUN: %clang_cc1 -x c++ -DEXTERN_C='extern "C"' -fsyntax-only -fms-extensions -verify -triple i686-pc-win32 %s
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#ifndef EXTERN_C
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#define EXTERN_C
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#if defined(__cplusplus)
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#define EXPECT_NODIAG
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// expected-no-diagnostics
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#endif
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#endif
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#ifndef EXPECT_NODIAG
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// expected-note-re@+2 1+ {{forward declaration of '{{(struct )?}}Foo'}}
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#endif
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struct Foo;
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EXTERN_C void __stdcall fwd_std(struct Foo p);
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#if !defined(EXPECT_NODIAG) && defined(_M_IX86)
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// expected-error@+2 {{parameter 'p' must have a complete type to use function 'fwd_std' with the stdcall calling convention}}
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#endif
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void (__stdcall *fp_fwd_std)(struct Foo) = &fwd_std;
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EXTERN_C void __fastcall fwd_fast(struct Foo p);
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#if !defined(EXPECT_NODIAG) && defined(_M_IX86)
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// expected-error@+2 {{parameter 'p' must have a complete type to use function 'fwd_fast' with the fastcall calling convention}}
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#endif
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void (__fastcall *fp_fwd_fast)(struct Foo) = &fwd_fast;
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EXTERN_C void __vectorcall fwd_vector(struct Foo p);
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#if !defined(EXPECT_NODIAG)
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// expected-error@+2 {{parameter 'p' must have a complete type to use function 'fwd_vector' with the vectorcall calling convention}}
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#endif
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void (__vectorcall *fp_fwd_vector)(struct Foo) = &fwd_vector;
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#if defined(__cplusplus)
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template <typename T> struct TemplateWrapper {
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#ifndef EXPECT_NODIAG
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// expected-error@+2 {{field has incomplete type 'Foo'}}
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#endif
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T field;
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};
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EXTERN_C void __vectorcall tpl_ok(TemplateWrapper<int> p);
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void(__vectorcall *fp_tpl_ok)(TemplateWrapper<int>) = &tpl_ok;
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EXTERN_C void __vectorcall tpl_fast(TemplateWrapper<Foo> p);
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#ifndef EXPECT_NODIAG
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// expected-note@+2 {{requested here}}
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#endif
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void(__vectorcall *fp_tpl_fast)(TemplateWrapper<Foo>) = &tpl_fast;
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#endif
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