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PATCH [6/n]: Prepare x32: PR rtl-optimization/47449: Don't propagate hard register non-local goto save area
- From: "H.J. Lu" <hongjiu dot lu at intel dot com>
- To: gcc-patches at gcc dot gnu dot org
- Cc: ebotcazou at libertysurf dot fr, rdsandiford at googlemail dot com
- Date: Sun, 3 Jul 2011 22:21:06 -0700
- Subject: PATCH [6/n]: Prepare x32: PR rtl-optimization/47449: Don't propagate hard register non-local goto save area
- Reply-to: "H.J. Lu" <hjl dot tools at gmail dot com>
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 rtl-optimization/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))