http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47744
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ubizjak at gmail dot com
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> 2011-02-15 06:26:32
UTC ---
A kludge:
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 98fa75d..290907d 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -11735,6 +11735,40 @@ ix86_decompose_address (rtx addr, struct ix86_address
*
out)
if (disp == const0_rtx && (base || index))
disp = NULL_RTX;
+ if (TARGET_X32
+ && base
+ && GET_MODE (base) == ptr_mode
+ && GET_CODE (base) == SUBREG
+ && (disp == NULL_RTX
+ || disp == const0_rtx
+ || CONST_INT_P (disp))
+ && GET_CODE (base_reg) == PLUS)
+ {
+ rtx op0 = XEXP (base_reg, 0);
+ rtx op1 = XEXP (base_reg, 1);
+ rtx c;
+ if (REG_P (op0) && CONST_INT_P (op1))
+ {
+ base_reg = op0;
+ c = op1;
+ }
+ else if (REG_P (op1) && CONST_INT_P (op0))
+ {
+ base_reg = op1;
+ c = op0;
+ }
+ else
+ return 0;
+
+ if (disp == NULL_RTX
+ || disp == const0_rtx)
+ disp = c;
+ else
+ disp = GEN_INT (INTVAL (disp) + INTVAL (c));
+
+ base = gen_rtx_REG (ptr_mode, REGNO (base_reg));
+ }
+
/* Allow arg pointer and stack pointer as index if there is not scaling. */
if (base_reg && index_reg && scale == 1
&& (index_reg == arg_pointer_rtx
