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9bfa970a40
We were injecting the function into the wrong semantic context, resulting in it failing to be registered as a global for redeclaration lookup. As a consequence, we accepted invalid code since r310616. Fixing that resulted in the "out-of-scope declaration" diagnostic firing a lot more often. It turned out that warning codepath was non-conforming, because it did not cause us to inject the implicitly-declared function into the enclosing block scope. We now only warn if the type of the out-of-scope declaration doesn't match the type of an implicitly-declared function; in all other cases, we produce the normal warning for an implicitly-declared function. llvm-svn: 314871
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
// RUN: %clang_cc1 %s -std=c90 -verify -fsyntax-only
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void t0(int x) {
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int explicit_decl();
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int (*p)();
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if(x > 0)
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x = g() + 1; // expected-note {{previous implicit declaration}}
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p = g;
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if(x < 0) {
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extern void u(int (*)[h()]);
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int (*q)() = h;
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}
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p = h; /* expected-error {{use of undeclared identifier 'h'}} */
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}
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void t1(int x) {
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int (*p)();
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switch (x) {
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g();
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case 0:
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x = h() + 1;
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break;
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case 1:
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p = g;
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p = h;
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break;
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}
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p = g; /* expected-error {{use of undeclared identifier 'g'}} */
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p = h; /* expected-error {{use of undeclared identifier 'h'}} */
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explicit_decl();
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p = explicit_decl;
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}
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int t2(int x) {
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int y = ({ if (x > 0) x = g() + 1; 2*x; });
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int (*p)() = g; /* expected-error {{use of undeclared identifier 'g'}} */
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return y;
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}
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int PR34822() {
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{int i = sizeof(PR34822_foo());} /* expected-note {{previous definition is here}} */
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{extern int PR34822_foo;} /* expected-error {{redefinition of 'PR34822_foo' as different kind of symbol}} */
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{extern int PR34822_bar;} /* expected-note {{previous declaration is here}} */
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{int i = sizeof(PR34822_bar());} /* expected-warning {{use of out-of-scope declaration of 'PR34822_bar' whose type is not compatible with that of an implicit declaration}} expected-error {{called object type 'int' is not a function or function pointer}} */
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}
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int (*p)() = g; /* expected-error {{use of undeclared identifier 'g'}} */
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int (*q)() = h; /* expected-error {{use of undeclared identifier 'h'}} */
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float g(); /* expected-error {{conflicting types for 'g'}} */
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