scc

Simple C99 Compiler
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commit 3182c9c3bcfd64f88e0dbd3cd8a6cef26a49b237
parent e2095e94bb09dd13787cedd1fd382e3ef236b98e
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Fri, 17 Jun 2016 14:31:25 +0200

[cc2-qbe] Fix additional return code

This additional return is added because we need
a jump instruction to the end of basic blocks,
but the last addition of OEFUN broke the previous
logic.

Diffstat:
cc2/arch/qbe/optm.c | 11+++++------
1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/cc2/arch/qbe/optm.c b/cc2/arch/qbe/optm.c @@ -11,7 +11,8 @@ optm_dep(Node *np) Node *p, *dst, *next = np->next; Symbol *sym, *osym; - if (!next) { + switch (op) { + case OEFUN: /* * In QBE we need at the end of a basic block * a jump, so we have to ensure that the last @@ -22,12 +23,10 @@ optm_dep(Node *np) * a ret there, and in the case of branches * we need a label for the next statement */ - if (op == ONOP || op == OBRANCH || (op != ORET && op != OJMP)) + op = (np->prev) ? np->prev->op : 0; + if (!op || op == ONOP || op == OBRANCH || (op != ORET && op != OJMP)) addstmt(newnode(ORET), KEEPCUR); - next = np->next; - } - - switch (op) { + break; case ONOP: if (next->op == ONOP) { sym = np->u.sym;