From: "H.J. Lu" <hongjiu.lu@intel.com>
To: gcc-patches@gcc.gnu.org
Subject: PATCH [6/n]: Prepare x32: PR middle-end/47449: Don't propagate hard register non-local goto save area
Date: Tue, 14 Jun 2011 16:04:00 -0000 [thread overview]
Message-ID: <20110614155739.GA19416@intel.com> (raw)
Hi,
RTL-based forward propagation pass shouldn't propagate hard register.
OK for trunk?
Thanks.
H.J.
---
2011-06-14 H.J. Lu <hongjiu.lu@intel.com>
PR middle-end/47449
* fwprop.c (forward_propagate_subreg): Don't propagate hard
register nor zero/sign extended hard register.
diff --git a/gcc/fwprop.c b/gcc/fwprop.c
index b2fd955..c8009d0 100644
--- a/gcc/fwprop.c
+++ b/gcc/fwprop.c
@@ -1101,6 +1101,7 @@ forward_propagate_subreg (df_ref use, rtx def_insn, rtx def_set)
src = SET_SRC (def_set);
if (GET_CODE (src) == SUBREG
&& REG_P (SUBREG_REG (src))
+ && REGNO (SUBREG_REG (src)) >= FIRST_PSEUDO_REGISTER
&& GET_MODE (SUBREG_REG (src)) == use_mode
&& subreg_lowpart_p (src)
&& all_uses_available_at (def_insn, use_insn))
@@ -1119,6 +1120,7 @@ forward_propagate_subreg (df_ref use, rtx def_insn, rtx def_set)
if ((GET_CODE (src) == ZERO_EXTEND
|| GET_CODE (src) == SIGN_EXTEND)
&& REG_P (XEXP (src, 0))
+ && REGNO (XEXP (src, 0)) >= FIRST_PSEUDO_REGISTER
&& GET_MODE (XEXP (src, 0)) == use_mode
&& !free_load_extend (src, def_insn)
&& all_uses_available_at (def_insn, use_insn))
reply other threads:[~2011-06-14 15:57 UTC|newest]
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