llvm-project/clang/test/Sema/heinous-extensions-on.c

// RUN: %clang_cc1 %s -verify -Wno-error=invalid-gnu-asm-cast

void foo(void) {
  int a;
  // PR3788
  asm("nop" : : "m"((int)(a))); // expected-warning {{invalid use of a cast in an inline asm context requiring an lvalue}}
  // PR3794
  asm("nop" : "=r"((unsigned)a)); // expected-warning {{invalid use of a cast in an inline asm context requiring an lvalue}}
}
Deprecate -fheinous-gnu-extensions; introduce a new warning flag (#105821) The new warning flag is `-Winvalid-gnu-asm-cast`, which is enabled by default and is a downgradable diagnostic which defaults to an error. This language dialect flag only controls whether a single diagnostic is emitted as a warning or as an error, and has never been expanded to include other behaviors. Given the rather perjorative name, it's better for us to just expose a diagnostic flag for the one warning in question and let the user elect to do `-Wno-error=` if they need to. There's not a lot of use of the language dialect flag in the wild, but there is some use of it. For the time being, this aliases the -f flag to `-Wno-error=invalid-gnu-asm-cast`, but the -f flag can eventually be removed. 2024-08-23 15:38:21 -04:00			`// RUN: %clang_cc1 %s -verify -Wno-error=invalid-gnu-asm-cast`
introduce a new -fheinous-gnu-extensions flag that enables really really horrible extensions that are disabled by default but that can be accepted by -fheinous-gnu-extensions (but which always emit a warning when enabled). As our first instance of this, implement PR3788/PR3794, which allows non-lvalues in inline asms in contexts where lvalues are required. bleh. llvm-svn: 66910 2009-03-13 17:38:01 +00:00
Use functions with prototypes when appropriate; NFC A significant number of our tests in C accidentally use functions without prototypes. This patch converts the function signatures to have a prototype for the situations where the test is not specific to K&R C declarations. e.g., void func(); becomes void func(void); This is the second batch of tests being updated (there are a significant number of other tests left to be updated). 2022-02-04 15:19:56 -05:00			`void foo(void) {`
Prep for new warning. llvm-svn: 76709 2009-07-22 00:43:08 +00:00			`int a;`
			`// PR3788`
Deprecate -fheinous-gnu-extensions; introduce a new warning flag (#105821) The new warning flag is `-Winvalid-gnu-asm-cast`, which is enabled by default and is a downgradable diagnostic which defaults to an error. This language dialect flag only controls whether a single diagnostic is emitted as a warning or as an error, and has never been expanded to include other behaviors. Given the rather perjorative name, it's better for us to just expose a diagnostic flag for the one warning in question and let the user elect to do `-Wno-error=` if they need to. There's not a lot of use of the language dialect flag in the wild, but there is some use of it. For the time being, this aliases the -f flag to `-Wno-error=invalid-gnu-asm-cast`, but the -f flag can eventually be removed. 2024-08-23 15:38:21 -04:00			`asm("nop" : : "m"((int)(a))); // expected-warning {{invalid use of a cast in an inline asm context requiring an lvalue}}`
Prep for new warning. llvm-svn: 76709 2009-07-22 00:43:08 +00:00			`// PR3794`
Deprecate -fheinous-gnu-extensions; introduce a new warning flag (#105821) The new warning flag is `-Winvalid-gnu-asm-cast`, which is enabled by default and is a downgradable diagnostic which defaults to an error. This language dialect flag only controls whether a single diagnostic is emitted as a warning or as an error, and has never been expanded to include other behaviors. Given the rather perjorative name, it's better for us to just expose a diagnostic flag for the one warning in question and let the user elect to do `-Wno-error=` if they need to. There's not a lot of use of the language dialect flag in the wild, but there is some use of it. For the time being, this aliases the -f flag to `-Wno-error=invalid-gnu-asm-cast`, but the -f flag can eventually be removed. 2024-08-23 15:38:21 -04:00			`asm("nop" : "=r"((unsigned)a)); // expected-warning {{invalid use of a cast in an inline asm context requiring an lvalue}}`
introduce a new -fheinous-gnu-extensions flag that enables really really horrible extensions that are disabled by default but that can be accepted by -fheinous-gnu-extensions (but which always emit a warning when enabled). As our first instance of this, implement PR3788/PR3794, which allows non-lvalues in inline asms in contexts where lvalues are required. bleh. llvm-svn: 66910 2009-03-13 17:38:01 +00:00			`}`