nvptx 'TARGET_USE_LOCAL_THUNK_ALIAS_P', 'TARGET_SUPPORTS_ALIASES'

This fixes up commit f8b15e177155960017ac0c5daef8780d1127f91c
"[nvptx] Use .alias directive for mptx >= 6.3", which regressed in
particular C++ test cases if the new '-malias' flag was not active.
In that case, we have to maintain (that is now, restore) the previous
state of 'TARGET_USE_LOCAL_THUNK_ALIAS_P', 'TARGET_SUPPORTS_ALIASES'.

The remaining three regressions are to be resolved via
<https://inbox.sourceware.org/87ledgzxcl.fsf@euler.schwinge.homeip.net>
"More '#ifdef ASM_OUTPUT_DEF' -> 'if (TARGET_SUPPORTS_ALIASES)' etc.".

	gcc/
	* config/nvptx/nvptx.h (TARGET_USE_LOCAL_THUNK_ALIAS_P)
	(TARGET_SUPPORTS_ALIASES): Define.

diff --git a/gcc/config/nvptx/nvptx.h b/gcc/config/nvptx/nvptx.h
index 15a52344d4a2f046f51575fcadcabb1313b26151..129427e5654dbc2d20c058c6de625e36cab53dbc 100644 (file)
--- a/gcc/config/nvptx/nvptx.h
+++ b/gcc/config/nvptx/nvptx.h
@@ -338,6 +338,11 @@ struct GTY(()) machine_function
 #define ASM_OUTPUT_DEF_FROM_DECLS(STREAM, NAME, VALUE) \
   nvptx_asm_output_def_from_decls (STREAM, NAME, VALUE)
 
+/* ..., but also override other macros to avoid 'gcc/defaults.h'-initialization
+   due to that dummy 'ASM_OUTPUT_DEF'.  */
+#define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) TARGET_SUPPORTS_ALIASES
+#define TARGET_SUPPORTS_ALIASES (nvptx_alias != 0)
+
 #define NO_DOT_IN_LABEL
 #define ASM_COMMENT_START "//"