From c2ad11ac70b9ae2010eb63d5eaf77ede0168ca41 Mon Sep 17 00:00:00 2001
From: grischka <grischka>
Date: Sun, 2 Oct 2016 01:38:22 +0200
Subject: tccgen: fix long long -> char/short cast

This was causing assembler bugs in a tcc compiled by itself
at i386-asm.c:352 when ExprValue.v was changed to uint64_t:

    if (op->e.v == (int8_t)op->e.v)
        op->type |= OP_IM8S;

A general test case:

    #include <stdio.h>
    int main(int argc, char **argv)
    {
        long long ll = 4000;
        int i = (char)ll;
        printf("%d\n", i);
        return 0;
    }

Output was "4000", now "-96".

Also: add "asmtest2" as asmtest with tcc compiled by itself
---
 tccgen.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'tccgen.c')

diff --git a/tccgen.c b/tccgen.c
index 2376848..398e165 100644
--- a/tccgen.c
+++ b/tccgen.c
@@ -1948,7 +1948,10 @@ static void force_charshort_cast(int t)
         vpushi((1 << bits) - 1);
         gen_op('&');
     } else {
-        bits = 32 - bits;
+        if ((vtop->type.t & VT_BTYPE) == VT_LLONG)
+            bits = 64 - bits;
+        else
+            bits = 32 - bits;
         vpushi(bits);
         gen_op(TOK_SHL);
         /* result must be signed or the SAR is converted to an SHL
-- 
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