create sub esp, imm instead off add esp -imm instructions

diff --git a/ir/be/ia32/ia32_emitter.c b/ir/be/ia32/ia32_emitter.c
index 084dc8f..a072268 100644 (file)
--- a/ir/be/ia32/ia32_emitter.c
+++ b/ir/be/ia32/ia32_emitter.c
@@ -1186,12 +1186,14 @@ void emit_be_Call(const ir_node *irn, ia32_emit_env_t *emit_env) {
 void emit_be_IncSP(const ir_node *irn, ia32_emit_env_t *emit_env) {
        FILE          *F    = emit_env->out;
        unsigned       offs = be_get_IncSP_offset(irn);
-       be_stack_dir_t dir  = be_get_IncSP_direction(irn);
        char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
 
        if (offs) {
-               lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "add %1S,%s%u", irn,
-                       (dir == be_stack_dir_along) ? " -" : " ", offs);
+               be_stack_dir_t dir = be_get_IncSP_direction(irn);
+               if (dir == be_stack_dir_along)
+                       lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "sub %1S, %u", irn, offs);
+               else
+                       lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "add %1S, %u", irn, offs);
                lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F (IncSP) */", irn);
        }
        else {