llvm-project/clang/test/Sema/inline-asm-validate.c

// RUN: %clang_cc1 -triple arm64-apple-macosx10.8.0 -fsyntax-only -verify %s

unsigned t, r, *p;

int foo (void) {
  __asm__ __volatile__( "stxr   %w[_t], %[_r], [%[_p]]" : [_t] "=&r" (t) : [_p] "p" (p), [_r] "r" (r) : "memory"); // expected-warning{{value size does not match register size specified by the constraint and modifier}} expected-note {{use constraint modifier "w"}}
  return 1;
}
ARM64: initial clang support commit. This adds Clang support for the ARM64 backend. There are definitely still some rough edges, so please bring up any issues you see with this patch. As with the LLVM commit though, we think it'll be more useful for merging with AArch64 from within the tree. llvm-svn: 205100 2014-03-29 15:09:45 +00:00			`// RUN: %clang_cc1 -triple arm64-apple-macosx10.8.0 -fsyntax-only -verify %s`

			`unsigned t, r, *p;`

			`int foo (void) {`
[AArch64, inline-asm] Improve diagnostic that is printed when the size of a variable that has regiser constraint "r" is not 64-bit. General register operands are output using 64-bit "x" register names, regardless of the size of the variable, unless the asm operand is prefixed with the "%w" modifier. This surprises and confuses many users who aren't familiar with aarch64 inline assembly rules. With this commit, a note and fixit hint are printed which tell the users that they need modifier "%w" in order to output a "w" register instead of an "x" register. <rdar://problem/12764785> llvm-svn: 216260 2014-08-22 06:05:21 +00:00			`__asm__ __volatile__( "stxr %w[_t], %[_r], [%[_p]]" : [_t] "=&r" (t) : [_p] "p" (p), [_r] "r" (r) : "memory"); // expected-warning{{value size does not match register size specified by the constraint and modifier}} expected-note {{use constraint modifier "w"}}`
ARM64: initial clang support commit. This adds Clang support for the ARM64 backend. There are definitely still some rough edges, so please bring up any issues you see with this patch. As with the LLVM commit though, we think it'll be more useful for merging with AArch64 from within the tree. llvm-svn: 205100 2014-03-29 15:09:45 +00:00			`return 1;`
			`}`