scc

simple c99 compiler
git clone git://git.simple-cc.org/scc
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commit f67d0534ce16ec2ac8a50c21e5f2e87915756dfe
parent de755db38679f8349e10fda5d6150ad10e1aaac5
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Fri, 16 Sep 2016 14:53:08 +0200

[cc2-qbe] Add basic support for struct assignment

At this moment there is no implementatin of struct assignment in
qbe, so this is only a skeleton to be filled later.

Diffstat:
Mcc2/arch/qbe/arch.h | 1+
Mcc2/arch/qbe/cgen.c | 10+++++++---
Mcc2/arch/qbe/code.c | 13++++++++++++-
Mcc2/cc2.h | 2+-
Mcc2/parser.c | 1+
5 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/cc2/arch/qbe/arch.h b/cc2/arch/qbe/arch.h @@ -9,6 +9,7 @@ enum asmop { ASSTH, ASSTW, ASSTL, + ASSTM, ASSTS, ASSTD, diff --git a/cc2/arch/qbe/cgen.c b/cc2/arch/qbe/cgen.c @@ -113,6 +113,10 @@ load(Type *tp, Node *np, Node *new) { int op; + if (tp->flags & AGGRF) { + *new = *np; + return new; + } switch (tp->size) { case 1: op = ASLDB; @@ -127,8 +131,7 @@ load(Type *tp, Node *np, Node *new) op = (tp->flags & FLOATF) ? ASLDD : ASLDL; break; default: - *new = *np; - return new; + abort(); } code(op, tmpnode(new, tp), np, NULL); @@ -273,7 +276,8 @@ assign(Type *tp, Node *to, Node *from) op = (tp->flags & FLOATF) ? ASSTD : ASSTL; break; default: - abort(); + op = ASSTM; + break; } code(op, to, from, NULL); return from; diff --git a/cc2/arch/qbe/code.c b/cc2/arch/qbe/code.c @@ -11,7 +11,7 @@ static void binary(void), unary(void), store(void), jmp(void), ret(void), branch(void), call(void), ecall(void), param(void), - alloc(void), form2local(void); + alloc(void), form2local(void), ldir(void); static struct opdata { void (*fun)(void); @@ -29,6 +29,7 @@ static struct opdata { [ASSTH] = {.fun = store, .txt = "store", .letter = 'h'}, [ASSTW] = {.fun = store, .txt = "store", .letter = 'w'}, [ASSTL] = {.fun = store, .txt = "store", .letter = 'l'}, + [ASSTM] = {.fun = ldir}, [ASSTS] = {.fun = store, .txt = "store", .letter = 's'}, [ASSTD] = {.fun = store, .txt = "store", .letter = 'd'}, @@ -369,6 +370,16 @@ binary(void) } static void +ldir(void) +{ + struct opdata *p = &optbl[pc->op]; + char to[ADDR_LEN], from[ADDR_LEN]; + /* TODO: what type do we use for the size? */ + + /* TODO: it is pending */ +} + +static void store(void) { struct opdata *p = &optbl[pc->op]; diff --git a/cc2/cc2.h b/cc2/cc2.h @@ -9,7 +9,7 @@ enum tflags { INTF = 2, FLOATF = 4, STRF = 8, - UNIONF = 16, + AGGRF = 16, FUNF = 32, PARF = 64, }; diff --git a/cc2/parser.c b/cc2/parser.c @@ -487,6 +487,7 @@ aggregate(void) tp->size = size->u.i; tp->align = align->u.i; + tp->flags = AGGRF; /* * type is the first field of Symbol so we can obtain the * address of the symbol from the address of the type.