https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87299
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-09-15
CC| |manu at gcc dot gnu.org
Component|preprocessor |middle-end
Summary|use of -save-temps causes |#pragma GCC target behaves
|undue macro re-definition |differently when using
|warning |-save-temps
Ever confirmed|0 |1
--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
test.c:4:0: warning: "x" redefined
# define x z
^
test.c:1:0: note: this is the location of the previous definition
#define x y
^
The mirror testcase:
#pragma GCC target("avx512f")
#define x y
# define __AVX512F__ z
#ifndef __AVX512F__
#define x z
#endif
$ gcc -c test.c
test.c:3:0: warning: "__AVX512F__" redefined
# define __AVX512F__ z
^
test.c:2:0: note: this is the location of the previous definition
#define x y
^
$ gcc -c --save-temps test.c
So #pragma GCC target does not seem to create the macro when --save-temps is
used.
