scc

Simple C99 Compiler
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commit d2b15f1ea22699cecc79a9cf2a10c236b807a191
parent d7cd0ce876107c05e34c7c00cef311e2023a9352
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Sun, 24 Jan 2016 22:17:20 +0100

[cc2] Generate code for static variables no initialized

These variables must go to BSS.

Diffstat:
cc2/arch/amd64-sysv/code.c | 5+++++
cc2/arch/i386-sysv/code.c | 5+++++
cc2/arch/z80/code.c | 24+++++++++++++++++++-----
cc2/cc2.h | 1+
cc2/parser.c | 18+++++++++++++++++-
5 files changed, 47 insertions(+), 6 deletions(-)

diff --git a/cc2/arch/amd64-sysv/code.c b/cc2/arch/amd64-sysv/code.c @@ -3,6 +3,11 @@ #include "../../cc2.h" void +allocdata(Type *tp) +{ +} + +void data(Node *np) { } diff --git a/cc2/arch/i386-sysv/code.c b/cc2/arch/i386-sysv/code.c @@ -3,6 +3,11 @@ #include "../../cc2.h" void +allocdata(Type *tp) +{ +} + +void data(Node *np) { } diff --git a/cc2/arch/z80/code.c b/cc2/arch/z80/code.c @@ -104,15 +104,16 @@ emittree(Node *np) } } -void -data(Node *np) + +static void +size2asm(Type *tp) { char *s; /* * In z80 we can ignore the alignment */ - switch (np->type.size) { + switch (tp->size) { case 1: s = "\tDB\t"; break; @@ -123,10 +124,23 @@ data(Node *np) s = "\tDD\t"; break; default: - s = "\tDS\t"; + s = (tp->flags & STRF) ? "\tTEXT\t" : "\tDS\t%llu,"; break; } - fputs(s, stdout); + printf(s, (unsigned long long) tp->size); +} + +void +allocdata(Type *tp) +{ + size2asm(tp); + puts("0"); +} + +void +data(Node *np) +{ + size2asm(&np->type); emittree(np); putchar('\n'); } diff --git a/cc2/cc2.h b/cc2/cc2.h @@ -153,6 +153,7 @@ extern void peephole(void); /* code.c */ extern void label(Symbol *sym); extern void data(Node *np); +extern void allocdata(Type *tp); extern void writeout(void); /* node.c */ diff --git a/cc2/parser.c b/cc2/parser.c @@ -208,9 +208,11 @@ constant(char *token, union tokenop u) ++token; if (*token == OSTRING) { + ++token; np->op = OSTRING; np->type.flags = STRF; - np->u.s = xstrdup(++token); + np->type.size = strlen(token); + np->u.s = xstrdup(token); } else { np->op = OCONST; np->type = *gettype(token++); @@ -349,6 +351,20 @@ vardecl(void) Symbol *sym; char *name; + if (lastsym && (lastsym->type.flags & INITF) == 0) { + switch (lastsym->kind) { + case EXTRN: + label(lastsym); + break; + case GLOB: + case PRIVAT: + case LOCAL: + label(lastsym); + allocdata(&lastsym->type); + break; + } + } + name = pop(); tp = pop(); np = pop();