scc

Simple C99 Compiler
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commit d96672c3e87b42ba8e269bd72386ee2431c3134c
parent 7ceb2bb314fb31bc01ce1781e00be4d29d38b7f3
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Thu,  2 Jun 2016 08:14:12 +0200

[cc2-qbe] Add initial label for qbe

Qbe needs a label at the beginning of every basic block,
but when we don't have any code inside of a function we
does not generate any basic block. This code forces to
have at least one basic block composed of a label and
a jump statement.

Diffstat:
cc2/arch/qbe/code.c | 4+++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/cc2/arch/qbe/code.c b/cc2/arch/qbe/code.c @@ -317,7 +317,7 @@ writeout(void) break; printf("%s%s %s.val", sep, size2asm(&p->type), symname(p)); } - puts(")\n{"); + puts(")\n{\n@.start"); /* allocate stack space for parameters */ for (p = locals; p && (p->type.flags & PARF) != 0; p = p->next) @@ -344,6 +344,8 @@ writeout(void) if (pc->op) (*optbl[pc->op].fun)(); } + if (!prog) + puts("\t\tret"); puts("}"); }