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i386.md (push): Prohibit symbolic constants if flag_pic. 

* i386.md (push): Prohibit symbolic constants if flag_pic.
(movsi+1): Likewise for move to non-register.

From-SVN: r17425
This commit is contained in:
Richard Henderson 1998-01-19 13:54:09 -08:00 committed by Richard Henderson
parent 11ea364a69
commit 685885b773
2 changed files with 44 additions and 4 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
Mon Jan 19 21:57:00 1998 Richard Henderson <rth@cygnus.com>
* i386.md (push): Prohibit symbolic constants if flag_pic.
(movsi+1): Likewise for move to non-register.
Mon Jan 19 11:15:38 1998 Jim Wilson <wilson@cygnus.com>
* alpha.c (mode_mask_operand): Accept 0xffffffff on 32 bit host.

43
gcc/config/i386/i386.md
View File

@ -832,10 +832,16 @@
;; and each is preceded by a corresponding push-insn pattern
;; (since pushes are not general_operands on the 386).
(define_insn ""
[(set (match_operand:SI 0 "push_operand" "=<")
(match_operand:SI 1 "nonmemory_operand" "rn"))]
"flag_pic"
"* return AS1 (push%L0,%1);")
(define_insn ""
[(set (match_operand:SI 0 "push_operand" "=<")
(match_operand:SI 1 "nonmemory_operand" "ri"))]
""
"!flag_pic"
"* return AS1 (push%L0,%1);")
;; On a 386, it is faster to push MEM directly.
@ -876,8 +882,10 @@
(define_insn ""
[(set (match_operand:SI 0 "general_operand" "=g,r")
(match_operand:SI 1 "general_operand" "ri,m"))]
"(!TARGET_MOVE || GET_CODE (operands[0]) != MEM) || (GET_CODE (operands[1]) != MEM)"
(match_operand:SI 1 "general_operand" "rn,im"))]
"((!TARGET_MOVE || GET_CODE (operands[0]) != MEM)
|| (GET_CODE (operands[1]) != MEM))
&& flag_pic"
"*
{
rtx link;
@ -896,12 +904,39 @@
/* Fastest way to change a 0 to a 1. */
return AS1 (inc%L0,%0);
if (flag_pic && SYMBOLIC_CONST (operands[1]))
if (SYMBOLIC_CONST (operands[1]))
return AS2 (lea%L0,%a1,%0);
return AS2 (mov%L0,%1,%0);
}")
(define_insn ""
[(set (match_operand:SI 0 "general_operand" "=g,r")
(match_operand:SI 1 "general_operand" "ri,m"))]
"((!TARGET_MOVE || GET_CODE (operands[0]) != MEM)
|| (GET_CODE (operands[1]) != MEM))
&& !flag_pic"
"*
{
rtx link;
if (operands[1] == const0_rtx && REG_P (operands[0]))
return AS2 (xor%L0,%0,%0);
if (operands[1] == const1_rtx
&& (link = find_reg_note (insn, REG_WAS_0, 0))
/* Make sure the insn that stored the 0 is still present. */
&& ! INSN_DELETED_P (XEXP (link, 0))
&& GET_CODE (XEXP (link, 0)) != NOTE
/* Make sure cross jumping didn't happen here. */
&& no_labels_between_p (XEXP (link, 0), insn)
/* Make sure the reg hasn't been clobbered. */
&& ! reg_set_between_p (operands[0], XEXP (link, 0), insn))
/* Fastest way to change a 0 to a 1. */
return AS1 (inc%L0,%0);
return AS2 (mov%L0,%1,%0);
}")
(define_insn ""
[(set (match_operand:HI 0 "push_operand" "=<")
(match_operand:HI 1 "nonmemory_operand" "ri"))]