aa876ff4c2
After the RA phase of ego, a procedure may put single-word and double-word values in the same reg_float. Then ncg will use both LOCAL and DLOCAL tokens at the same offset. I add isregvar_size() to ncg. It receives the size of the LOCAL or DLOCAL token, and picks the register of the correct size. This fixes a problem where ncg got the wrong-size register and corrupted the stack. This problem caused one of my test programs to segfault from stack underflow. Also adjust how fixregvars() handles both sizes.
36 lines
726 B
C
36 lines
726 B
C
/*
|
|
* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
|
|
* See the copyright notice in the ACK home directory, in the file "Copyright".
|
|
*/
|
|
/* $Id$ */
|
|
|
|
struct regvar {
|
|
struct regvar *rv_next;
|
|
long rv_off;
|
|
int rv_size;
|
|
int rv_type;
|
|
int rv_score;
|
|
int rv_reg;
|
|
};
|
|
|
|
struct regassigned {
|
|
struct regvar *ra_rv;
|
|
int ra_score;
|
|
};
|
|
|
|
extern struct regvar *rvlist;
|
|
extern int nregvar[];
|
|
extern struct regassigned *regassigned[];
|
|
|
|
struct regvar *linkreg(long, int, int, int);
|
|
void tryreg(struct regvar *, int);
|
|
void fixregvars(int);
|
|
int isregvar(long);
|
|
#ifdef REGLAP
|
|
int isregvar_size(long, int);
|
|
#else
|
|
#define isregvar_size(off, size) isregvar(off)
|
|
#endif
|
|
int isregtyp(long);
|
|
void unlinkregs(void);
|