So, to support things like this:
(define_constants
(C1_TEMP_REGNUM PROLOGUE_SCRATCH_1)
(C1_TEMP2_REGNUM PROLOGUE_SCRATCH_2)
I need the rtl reader to do less checking. We we turn off int validation, this
then works, and we get:
#define C1_TEMP_REGNUM PROLOGUE_SCRATCH_1
in insn-constants.h, which is what I wanted. The problem is that I choose
different scratch register based upon the cpu and this is then used in a
clobber in the rtl of a define_insn.
I’d be happy to do this some other way, but, I didn’t see a way to do this,
otherwise.
Absent a better solution, I’d like to pursue this. The only question I have,
remove the checking, or allow the target to explain that we don’t want the
checking?
diff --git a/gcc/read-rtl.c b/gcc/read-rtl.c
index c198b5b..ceef96c 100644
--- a/gcc/read-rtl.c
+++ b/gcc/read-rtl.c
@@ -807,8 +807,12 @@ validate_const_int (const char *string)
valid = 0;
break;
}
+#if 0
+ /* In order to support defining the md constants in terms of CPP constants
from tm.h, we
+ can't check this. */
if (!valid)
fatal_with_file_and_line ("invalid decimal constant \"%s\"\n", string);
+#endif
}
static void
