inline-asm: Add - constraint modifier support for toplevel extended asm [PR41045]

The following patch adds - constraint modifier support (only in toplevel asms),
which one can use to allow i, s and n constraint to accept SYMBOL_REFs
even with -fpic.
So, the recommended way mark toplevel asm as defining some symbol
would be ":" constraint (usually with cc modifier in the pattern), while
to mark toplevel asm as using some symbol (again, either function or
variable), one would use "-s" constraint again with address of that function
or variable.

2024-12-18  Jakub Jelinek  <jakub@redhat.com>

	PR c/41045
gcc/
	* stmt.cc (parse_output_constraint, parse_input_constraint): Handle
	- modifier.
	* recog.h (raw_constraint_p): Declare.
	* recog.cc (raw_constraint_p): New variable.
	(asm_operand_ok, constrain_operands): Handle - modifier.
	* common.md (i, s, n): For raw_constraint_p don't require
	LEGITIMATE_PIC_OPERAND_P.
	* doc/md.texi: Document - constraint modifier.
gcc/c/
	* c-typeck.cc (build_asm_expr): Reject - constraint modifier inside
	of a function.
gcc/cp/
	* semantics.cc (finish_asm_stmt): Reject - constraint modifier inside
	of a function.
gcc/testsuite/
	* c-c++-common/toplevel-asm-4.c: Add missing %cc2 use in template, add
	bar, x, &y operands with "-i" and "-s" constraints.
	(x, y): New variables.
	(bar): Declare.
	* c-c++-common/toplevel-asm-7.c: New test.
	* c-c++-common/toplevel-asm-8.c: New test.

0 files changed, 0 insertions, 0 deletions