From b5323e5e0c54d1db8b22b8ed12588bc34921b8b2 Mon Sep 17 00:00:00 2001 From: Teddy Date: Sun, 27 Apr 2014 20:54:42 +0800 Subject: ++ and -- now working --- ssa.c | 143 +++++++++++++++++++++++++++++++++++++++++++++--------------------- 1 file changed, 98 insertions(+), 45 deletions(-) (limited to 'ssa.c') diff --git a/ssa.c b/ssa.c index 4ec90f6..03ffc8d 100644 --- a/ssa.c +++ b/ssa.c @@ -36,6 +36,12 @@ void cblock_popback(CBlock_t cblk) { last->prev->next = last->next; } +void cblock_popfront(CBlock_t cblk) { + CInst_t first = cblk->insts->next; + first->next->prev = first->prev; + first->prev->next = first->next; +} + CInst_t cblock_getback(CBlock_t cblk) { return cblk->insts->prev; } @@ -148,6 +154,16 @@ void cinst_print(CInst_t inst) { case AND: op = "&"; break; case XOR: op = "^"; break; case OR: op = "|"; break; + case LT: op = "<"; break; + case GT: op = ">"; break; + case LE: op = "<="; break; + case GE: op = ">="; break; + case LOR: op = "||"; break; + case LAND: op = "&&"; break; + case EQ: op = "=="; break; + case NE: op = "!="; break; + case NOR: op = "nor"; break; + case SEQ: op = "seq"; break; default: ; } copr_print(&inst->dest); @@ -191,8 +207,8 @@ void ssa_generate(CScope_t scope) { } } -COpr ssa_exp_(CNode *p, CBlock_t, CInst_t); -COpr ssa_postfix(CNode *p, CBlock_t cur, CInst_t lval) { +COpr ssa_exp_(CNode *p, CBlock_t, CInst_t, CBlock_t); +COpr ssa_postfix(CNode *p, CBlock_t cur, CInst_t lval, CBlock_t succ) { CNode *post = p->chd->next; CType_t rt = p->ext.type; CInst_t base = NEW(CInst); @@ -204,14 +220,14 @@ COpr ssa_postfix(CNode *p, CBlock_t cur, CInst_t lval) { off->dest.kind = TMP; off->dest.info.var = ctmp_create(post->chd->ext.type); off->op = MUL; - off->src1 = ssa_exp_(post->chd, cur, 0); + off->src1 = ssa_exp_(post->chd, cur, NULL, succ); off->src2.kind = IMM; off->src2.info.imm = calc_size(rt); cblock_append(cur, off); base->dest.kind = TMP; base->dest.info.var = ctmp_create(rt); - base->src1 = ssa_exp_(p->chd, cur, 0); + base->src1 = ssa_exp_(p->chd, cur, NULL, succ); base->src2 = off->dest; base->op = rt->type == CARR ? ADD : ARR; } @@ -221,7 +237,7 @@ COpr ssa_postfix(CNode *p, CBlock_t cur, CInst_t lval) { base->dest.kind = TMP; base->dest.info.var = ctmp_create(rt); base->op = (rt->type == CSTRUCT || rt->type == CUNION) ? ADD : ARR; - base->src1 = ssa_exp_(p->chd, cur, 0); + base->src1 = ssa_exp_(p->chd, cur, NULL, succ); base->src2.kind = IMM; base->src2.info.imm = p->ext.offset; } @@ -231,11 +247,44 @@ COpr ssa_postfix(CNode *p, CBlock_t cur, CInst_t lval) { base->dest.kind = TMP; base->dest.info.var = ctmp_create(rt); base->op = (rt->type == CSTRUCT || rt->type == CUNION) ? ADD : ARR; - base->src1 = ssa_exp_(p->chd, cur, 0); + base->src1 = ssa_exp_(p->chd, cur, NULL, succ); base->src2.kind = IMM; base->src2.info.imm = p->ext.offset; } break; + default: + { + CInst_t tins = NEW(CInst); + ssa_exp_(p->chd, cur, tins, succ); + base->op = post->rec.subtype == OPT_INC ? ADD : SUB; + base->src2.kind = IMM; + base->src2.info.imm = 1; + base->src1 = ssa_exp_(p->chd, cur, NULL, succ); + if (tins->op == MOVE) + { + base->dest = tins->dest; + cblock_append(succ, base); + free(tins); + } + else + { + CInst_t tins2 = NEW(CInst); + base->dest.kind = TMP; + base->dest.info.var = ctmp_create(p->ext.type); + tins->src1 = base->dest; + tins2->op = ARR; + tins2->src1 = tins->dest; + tins2->src2 = tins->src2; + tins2->dest.kind = TMP; + tins2->dest.info.var = ctmp_create(p->ext.type); + + cblock_append(succ, base); + cblock_append(succ, tins); + cblock_append(succ, tins2); + } + return base->src1; + } + break; } if (lval) @@ -250,7 +299,7 @@ COpr ssa_postfix(CNode *p, CBlock_t cur, CInst_t lval) { return base->dest; } -COpr ssa_exp_(CNode *p, CBlock_t cur, CInst_t lval) { +COpr ssa_exp_(CNode *p, CBlock_t cur, CInst_t lval, CBlock_t succ) { COpr res; CInst_t inst = NEW(CInst); switch (p->type) @@ -279,8 +328,8 @@ COpr ssa_exp_(CNode *p, CBlock_t cur, CInst_t lval) { if (op == '=') { - inst->src1 = ssa_exp_(p->chd->next, cur, NULL); - ssa_exp_(p->chd, cur, inst); + inst->src1 = ssa_exp_(p->chd->next, cur, NULL, succ); + ssa_exp_(p->chd, cur, inst, succ); cblock_append(cur, inst); if (inst->op == MOVE) return inst->dest; @@ -302,7 +351,7 @@ COpr ssa_exp_(CNode *p, CBlock_t cur, CInst_t lval) { if (lval) { lval->op = WARR; - lval->dest = ssa_exp_(p->chd, cur, NULL); + lval->dest = ssa_exp_(p->chd, cur, NULL, succ); lval->src2.kind = IMM; lval->src2.info.imm = 0; return lval->dest; @@ -310,7 +359,7 @@ COpr ssa_exp_(CNode *p, CBlock_t cur, CInst_t lval) { else { inst->op = ARR; - inst->src1 = ssa_exp_(p->chd, cur, NULL); + inst->src1 = ssa_exp_(p->chd, cur, NULL, succ); inst->src2.kind = IMM; inst->src2.info.imm = 0; inst->dest.kind = TMP; @@ -322,7 +371,7 @@ COpr ssa_exp_(CNode *p, CBlock_t cur, CInst_t lval) { } else { - + int unary = 0; inst->op = -1; switch (op) { @@ -336,13 +385,21 @@ COpr ssa_exp_(CNode *p, CBlock_t cur, CInst_t lval) { case ASS_AND: inst->op = AND; break; case ASS_XOR: inst->op = XOR; break; case ASS_OR: inst->op = OR; break; + case OPT_INC: inst->op = ADD; unary = 1; break; + case OPT_DEC: inst->op = SUB; unary = 1; break; } if (inst->op != -1) { CInst_t tins = NEW(CInst); - ssa_exp_(p->chd, cur, tins); /* as lval */ - inst->src1 = ssa_exp_(p->chd, cur, NULL); /* as rval */ - inst->src2 = ssa_exp_(p->chd->next, cur, NULL); + ssa_exp_(p->chd, cur, tins, succ); /* as lval */ + inst->src1 = ssa_exp_(p->chd, cur, NULL, succ); /* as rval */ + if (unary) + { + inst->src2.kind = IMM; + inst->src2.info.imm = 1; + } + else + inst->src2 = ssa_exp_(p->chd->next, cur, NULL, succ); if (tins->op == MOVE) { inst->dest = tins->dest; @@ -373,16 +430,16 @@ COpr ssa_exp_(CNode *p, CBlock_t cur, CInst_t lval) { { case EXP_CAST: free(inst); - return ssa_exp_(p->chd->next, cur, lval); + return ssa_exp_(p->chd->next, cur, lval, succ); case EXP_POSTFIX: free(inst); - return ssa_postfix(p, cur, lval); + return ssa_postfix(p, cur, lval, succ); /* KW_SIZEOF is eliminated during semantic checking */ default: { - COpr lhs = ssa_exp_(p->chd, cur, lval), rhs; + COpr lhs = ssa_exp_(p->chd, cur, lval, succ), rhs; if (p->chd->next) - rhs = ssa_exp_(p->chd->next, cur, lval); + rhs = ssa_exp_(p->chd->next, cur, lval, succ); inst->src1 = lhs; inst->src2 = rhs; @@ -442,22 +499,6 @@ COpr ssa_exp_(CNode *p, CBlock_t cur, CInst_t lval) { inst->src2.kind = IMM; inst->src2.info.imm = 0; break; - case OPT_INC: - auto_dest = 0; - inst->op = ADD; - inst->dest = lhs; - inst->src1 = lhs; - inst->src2.kind = IMM; - inst->src2.info.imm = 1; - break; - case OPT_DEC: - auto_dest = 0; - inst->op = SUB; - inst->dest = lhs; - inst->src1 = lhs; - inst->src2.kind = IMM; - inst->src2.info.imm = 1; - break; default: auto_dest = 0; } @@ -478,10 +519,22 @@ COpr ssa_exp_(CNode *p, CBlock_t cur, CInst_t lval) { return res; } -COpr ssa_exp(CNode *p, CBlock_t cur) { - COpr res = ssa_exp_(p, cur, NULL); - CInst_t last = cblock_getback(cur); - if (last->dest.kind == TMP) /* temporary not used */ +COpr ssa_exp(CNode *p, CBlock_t cur, int discard_last) { + CBlock_t succ = cblock_create(); + COpr res = ssa_exp_(p, cur, NULL, succ); + CInst_t last; + { + CInst_t head = succ->insts, t; + while (head->next != head) + { + t = head->next; + cblock_popfront(succ); + cblock_append(cur, t); + } + free(succ); + } + last = cblock_getback(cur); + if (discard_last && last->dest.kind == TMP) /* temporary not used */ { ctmp_destroy(last->dest.info.var); free(last); @@ -505,7 +558,7 @@ CBlock_t ssa_while(CNode *p, CBlock_t cur) { DBLINK(loop_t, cond_blk); cfg_add_edge(loop_t, cond_blk); - ssa_exp(exp, cond_blk); + ssa_exp(exp, cond_blk, 0); j_inst->op = GOTO; j_inst->dest.kind = IMM; @@ -546,9 +599,9 @@ CBlock_t ssa_for(CNode *p, CBlock_t cur) { DBLINK(loop_t, cond_blk); cfg_add_edge(loop_t, cond_blk); - ssa_exp(exp1, cur); - ssa_exp(exp2, cond_blk); - ssa_exp(exp3, loop_t); + ssa_exp(exp1, cur, 1); + ssa_exp(exp2, cond_blk, 0); + ssa_exp(exp3, loop_t, 1); j_inst->op = GOTO; j_inst->dest.kind = IMM; @@ -580,7 +633,7 @@ CBlock_t ssa_if(CNode *p, CBlock_t cur, CBlock_t loop_exit) { next_blk, else_blk, else_t; CInst_t if_inst = NEW(CInst); - ssa_exp(p->chd, cur); + ssa_exp(p->chd, cur, 0); if_inst->op = BEQZ; if_inst->src1 = cblock_getback(cur)->dest; /* calculated cond */ if_inst->dest.kind = IMM; @@ -638,7 +691,7 @@ CBlock_t ssa_stmt(CNode *p, CBlock_t cur, CBlock_t loop_exit) { switch (p->rec.subtype) { case STMT_EXP: - ssa_exp(p->chd, cur); + ssa_exp(p->chd, cur, 1); break; case STMT_COMP: cur = ssa_comp(p, cur, loop_exit); -- cgit v1.2.3-70-g09d2