re PR tree-optimization/32383 (ICE with reciprocals and -ffast-math)

re PR tree-optimization/32383 (ICE with reciprocals and -ffast-math)

	PR tree-optimization/32383
	* targhooks.c (default_builtin_reciprocal): Add new bool argument.
	* targhooks.h (default_builtin_reciprocal): Update prototype.
	* target.h (struct gcc_target): Update builtin_reciprocal.
	* doc/tm.texi (TARGET_BUILTIN_RECIPROCAL): Update description.
	* tree-ssa-math-opts (execute_cse_reciprocals): Skip statements
	where arg1 is not SSA_NAME.  Pass true to targetm.builtin_reciprocal
	when fndecl is in BUILT_IN_MD class.
	(execute_convert_to_rsqrt): Ditto.

	* config/i386/i386.c (ix86_builtin_reciprocal): Update for new bool
	argument.  Convert IX86_BUILTIN_SQRTPS code only when md_fn is true.
	Convert BUILT_IN_SQRTF code only  when md_fn is false.

testsuite/ChangeLog:

	PR tree-optimization/32383
	* testsuite/g++.dg/opt/pr32383.C: New test.

From-SVN: r125790