2017-07-25 Uros Bizjak <ubiz...@gmail.com>
* config/i386/i386.c (ix86_decompose_address): Do not check for
register RTX when looking at index_reg or base_reg.
* config/i386/i386.h (INCOMING_RETURN_ADDR_RTX): Use stack_pointer_rtx.
Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.
Committed to mainline.
Uros.
Index: config/i386/i386.c
===================================================================
--- config/i386/i386.c (revision 250499)
+++ config/i386/i386.c (working copy)
@@ -16187,9 +16187,9 @@ ix86_decompose_address (rtx addr, struct ix86_addr
/* 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
- || index_reg == frame_pointer_rtx
- || (REG_P (index_reg) && REGNO (index_reg) == STACK_POINTER_REGNUM)))
+ && (REGNO (index_reg) == ARG_POINTER_REGNUM
+ || REGNO (index_reg) == FRAME_POINTER_REGNUM
+ || REGNO (index_reg) == SP_REG))
{
std::swap (base, index);
std::swap (base_reg, index_reg);
@@ -16197,14 +16197,11 @@ ix86_decompose_address (rtx addr, struct ix86_addr
/* Special case: %ebp cannot be encoded as a base without a displacement.
Similarly %r13. */
- if (!disp
- && base_reg
- && (base_reg == hard_frame_pointer_rtx
- || base_reg == frame_pointer_rtx
- || base_reg == arg_pointer_rtx
- || (REG_P (base_reg)
- && (REGNO (base_reg) == HARD_FRAME_POINTER_REGNUM
- || REGNO (base_reg) == R13_REG))))
+ if (!disp && base_reg
+ && (REGNO (base_reg) == ARG_POINTER_REGNUM
+ || REGNO (base_reg) == FRAME_POINTER_REGNUM
+ || REGNO (base_reg) == BP_REG
+ || REGNO (base_reg) == R13_REG))
disp = const0_rtx;
/* Special case: on K6, [%esi] makes the instruction vector decoded.
@@ -16213,7 +16210,7 @@ ix86_decompose_address (rtx addr, struct ix86_addr
to test cfun for being non-NULL. */
if (TARGET_K6 && cfun && optimize_function_for_speed_p (cfun)
&& base_reg && !index_reg && !disp
- && REG_P (base_reg) && REGNO (base_reg) == SI_REG)
+ && REGNO (base_reg) == SI_REG)
disp = const0_rtx;
/* Special case: encode reg+reg instead of reg*2. */
Index: config/i386/i386.h
===================================================================
--- config/i386/i386.h (revision 250499)
+++ config/i386/i386.h (working copy)
@@ -2165,7 +2165,7 @@ extern int const svr4_dbx_register_map[FIRST_PSEUD
/* Before the prologue, RA is at 0(%esp). */
#define INCOMING_RETURN_ADDR_RTX \
- gen_rtx_MEM (Pmode, gen_rtx_REG (Pmode, STACK_POINTER_REGNUM))
+ gen_rtx_MEM (Pmode, stack_pointer_rtx)
/* After the prologue, RA is at -4(AP) in the current frame. */
#define RETURN_ADDR_RTX(COUNT, FRAME) \
