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add new target-specific abi0 pass

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The general idea is to give abis a
chance to talk before we've done all
the optimizations. Currently, all
targets eliminate {par,arg,ret}{sb,ub,...}
during this pass. The forthcoming
arm64_apple will, however, insert
proper extensions during abi0.

Moving forward abis can, for example,
lower small-aggregates passing there
so that memory optimizations can
interact better with function calls.
This commit is contained in:
Quentin Carbonneaux 2022-08-31 17:09:04 +02:00
parent 0b26cd4f5e
commit a9a70e30a8
7 changed files with 43 additions and 7 deletions
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9
all.h
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@ -52,7 +52,8 @@ struct Target {
bits (*retregs)(Ref, int[2]);
bits (*argregs)(Ref, int[2]);
int (*memargs)(int);
void (*abi)(Fn *);
void (*abi0)(Fn *);
void (*abi1)(Fn *);
void (*isel)(Fn *);
void (*emitfn)(Fn *, FILE *);
void (*emitfin)(FILE *);
@ -183,6 +184,9 @@ enum {
#define ispar(o) INRANGE(o, Opar, Opare)
#define isarg(o) INRANGE(o, Oarg, Oargv)
#define isret(j) INRANGE(j, Jretw, Jret0)
#define isparbh(o) INRANGE(o, Oparsb, Oparuh)
#define isargbh(o) INRANGE(o, Oargsb, Oarguh)
#define isretbh(j) INRANGE(j, Jretsb, Jretuh)
enum {
Kx = -1, /* "top" class (see usecheck() and clsmerge()) */
@ -478,6 +482,9 @@ void printfn(Fn *, FILE *);
void printref(Ref, Fn *, FILE *);
void err(char *, ...) __attribute__((noreturn));
/* abi.c */
void elimsb(Fn *);
/* cfg.c */
Blk *blknew(void);
void edgedel(Blk *, Blk **);