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

1 files changed, 6 insertions, 3 deletions

diff --git a/tests/Makefile b/tests/Makefile
index 78b5644..50b3a8c 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -21,7 +21,7 @@ TESTS = \
 BTESTS = test1b test3b btest
 
 # test4 -- problem with -static
-# asmtest -- minor differences with gcc
+# asmtest / asmtest2 -- minor differences with gcc
 # btest -- works on i386 (including win32)
 
 # bounds-checking is supported only on i386
@@ -173,12 +173,15 @@ asmtest.ref: asmtest.S
 	$(CC) -Wa,-W -o asmtest.ref.o -c asmtest.S
 	objdump -D asmtest.ref.o > asmtest.ref
 
-asmtest: asmtest.ref
+asmtest asmtest2: asmtest.ref
 	@echo ------------ $@ ------------
-	$(TCC) -c asmtest.S
+	$(TCC) $(MAYBE_RUN_TCC) -c asmtest.S
 	objdump -D asmtest.o > asmtest.out
 	@if diff -u --ignore-matching-lines="file format" asmtest.ref asmtest.out ; then echo "ASM Auto Test OK"; fi
 
+# test assembler with tcc compiled by itself
+asmtest2: MAYBE_RUN_TCC = $(RUN_TCC)
+
 # Check that code generated by libtcc is binary compatible with
 # that generated by CC
 abitest-cc$(EXESUF): abitest.c $(LIBTCC)