i386.md (widening and peepholes): Mask the constant instead of using gen_lowpart.

        * i386.md (widening and peepholes): Mask the constant instead of
        using gen_lowpart.

From-SVN: r31822

gcc/ChangeLog

+2000-02-06  Richard Henderson  <rth@cygnus.com>
+
+	* i386.c (ix86_agi_dependant): Handle pro_epilogue_adjust_stack
+	as a TYPE_LEA insn.
+
+	* i386.md (widening and peepholes): Mask the constant instead of
+	using gen_lowpart.
+
 2000-02-05  Zack Weinberg  <zack@wolery.cumb.org>
 
 	* cppfiles.c (read_and_prescan) [case SPECCASE_QUESTION]: Bump

gcc/config/i386/i386.md

@@ -8928,7 +8928,7 @@
 (define_split
   [(set (reg:CCNO 17)
 	(compare:CCNO (and (match_operand 1 "aligned_operand" "")
-			   (match_operand 2 "immediate_operand" ""))
+			   (match_operand 2 "const_int_operand" ""))
 		      (const_int 0)))
    (set (match_operand 0 "register_operand" "")
 	(and (match_dup 1) (match_dup 2)))]
@@ -8941,14 +8941,15 @@
 			         (const_int 0)))
 	      (set (match_dup 0)
 		   (and:SI (match_dup 1) (match_dup 2)))])]
-  "operands[0] = gen_lowpart (SImode, operands[0]);
-   operands[1] = gen_lowpart (SImode, operands[1]);
-   operands[2] = gen_lowpart (SImode, operands[2]);")
+  "operands[2]
+     = GEN_INT (INTVAL (operands[2]) & GET_MODE_MASK (GET_MODE (operands[0])));
+   operands[0] = gen_lowpart (SImode, operands[0]);
+   operands[1] = gen_lowpart (SImode, operands[1]);")
 
 (define_split
   [(set (reg:CCNO 17)
 	(compare:CCNO (and (match_operand 0 "aligned_operand" "")
-			   (match_operand 1 "immediate_operand" ""))
+			   (match_operand 1 "const_int_operand" ""))
 		      (const_int 0)))]
   "! TARGET_PARTIAL_REG_STALL && reload_completed
    && (GET_MODE (operands[0]) == HImode
@@ -8957,8 +8958,9 @@
   [(set (reg:CCNO 17)
 	(compare:CCNO (and:SI (match_dup 0) (match_dup 1))
 		      (const_int 0)))]
-  "operands[0] = gen_lowpart (SImode, operands[0]);
-   operands[1] = gen_lowpart (SImode, operands[1]);")
+  "operands[1]
+     = GEN_INT (INTVAL (operands[1]) & GET_MODE_MASK (GET_MODE (operands[0])));
+   operands[0] = gen_lowpart (SImode, operands[0]);")
 
 (define_split
   [(set (match_operand 0 "register_operand" "")