REGs are unique. This patch recognizes that fact, speeding up rs6000
gcc infinitesimally. Bootstrapped etc. powerpc64le-linux. OK?
* gcc/config/rs6000/rs6000.c (rs6000_legitimate_address_p): Replace
rtx_equal_p call for known REGs with pointer comparison.
(rs6000_secondary_reload_memory): Likewise.
(rs6000_secondary_reload_inner): Likewise.
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c
index d3355710d91..9c3e0ea3529 100644
--- a/gcc/config/rs6000/rs6000.c
+++ b/gcc/config/rs6000/rs6000.c
@@ -9227,7 +9227,7 @@ rs6000_legitimate_address_p (machine_mode mode, rtx x,
bool reg_ok_strict)
reg_ok_strict, false)
|| (!avoiding_indexed_address_p (mode)
&& legitimate_indexed_address_p (XEXP (x, 1), reg_ok_strict)))
- && rtx_equal_p (XEXP (XEXP (x, 1), 0), XEXP (x, 0)))
+ && XEXP (XEXP (x, 1), 0) == XEXP (x, 0))
return 1;
if (reg_offset_p && !quad_offset_p
&& legitimate_lo_sum_address_p (mode, x, reg_ok_strict))
@@ -19011,7 +19011,7 @@ rs6000_secondary_reload_memory (rtx addr,
plus_arg1 = XEXP (addr, 1);
if (!base_reg_operand (reg, GET_MODE (reg))
|| GET_CODE (plus_arg1) != PLUS
- || !rtx_equal_p (reg, XEXP (plus_arg1, 0)))
+ || XEXP (plus_arg1, 0) != reg)
{
fail_msg = "bad PRE_MODIFY";
extra_cost = -1;
@@ -19748,7 +19748,7 @@ rs6000_secondary_reload_inner (rtx reg, rtx mem, rtx
scratch, bool store_p)
op1 = XEXP (addr, 1);
if (!base_reg_operand (op0, Pmode)
|| GET_CODE (op1) != PLUS
- || !rtx_equal_p (op0, XEXP (op1, 0)))
+ || XEXP (op1, 0) != op0)
rs6000_secondary_reload_fail (__LINE__, reg, mem, scratch, store_p);
if ((addr_mask & RELOAD_REG_PRE_MODIFY) == 0)
--
Alan Modra
Australia Development Lab, IBM
