i386.md (cmpqi_minus_1): Use {b} for QImode operation.

	* config/i386/i386.md (cmpqi_minus_1): Use {b} for QImode operation.

	* gcc.c-torture/compile/20010117-1.c: New test.

From-SVN: r39092

gcc/ChangeLog

+2001-01-17  Jakub Jelinek  <jakub@redhat.com>
+
+	* config/i386/i386.md (cmpqi_minus_1): Use {b} for QImode operation.
+
 Tue Jan 16 22:23:04 2001  Alan Modra (alan@linuxcare.com.au)
 
 	* config/pa/pa.h (PIC_OFFSET_TABLE_REGNUM_SAVED): Remove.

gcc/config/i386/i386.md

@@ -1158,7 +1158,7 @@
 			   (match_operand:QI 1 "general_operand" "ri,mr"))
 		 (const_int 0)))]
   "ix86_match_ccmode (insn, CCGOCmode)"
-  "cmp{w}\\t{%1, %0|%0, %1}"
+  "cmp{b}\\t{%1, %0|%0, %1}"
   [(set_attr "type" "icmp")
    (set_attr "mode" "QI")])
 

gcc/testsuite/ChangeLog

+2001-01-17  Jakub Jelinek  <jakub@redhat.com>
+
+	* gcc.c-torture/compile/20010117-1.c: New test.
+
 2001-01-15  Toon Moene  <toon@moene.indiv.nluug.nl>
 
 	* g77.f-torture/execute/20010116.[fx]: New test,

gcc/testsuite/gcc.c-torture/compile/20010117-1.c

+unsigned char u, v, w;
+
+void baz (void)
+{
+  if ((u - v - w) & 0x80)
+    v = 1;
+}