From: Daniel Jacobowitz <dan@debian.org>
Date: Sun, 25 Jul 2004 17:01:49 +0000 (+0000)
Subject: regmove.c (optimize_reg_copy_1): Don't try to replace call-used hard registers.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=97b69e514a011eb1c529281c355d61399956edb4;p=gcc.git

regmove.c (optimize_reg_copy_1): Don't try to replace call-used hard registers.

	* regmove.c (optimize_reg_copy_1): Don't try to replace call-used
	hard registers.

From-SVN: r85149
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index bd5d443492f..55be14e1c48 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2004-07-25  Daniel Jacobowitz  <dan@debian.org>
+
+	* regmove.c (optimize_reg_copy_1): Don't try to replace call-used
+	hard registers.
+
 2004-07-25  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
 
 	* tree-ssa-operands.c (get_stmt_operands, get_expr_operands):
diff --git a/gcc/regmove.c b/gcc/regmove.c
index 5816831dc6c..5bd6f40e21f 100644
--- a/gcc/regmove.c
+++ b/gcc/regmove.c
@@ -431,6 +431,9 @@ optimize_reg_copy_1 (rtx insn, rtx dest, rtx src)
 	  || (sregno < FIRST_PSEUDO_REGISTER
 	      && asm_noperands (PATTERN (p)) >= 0
 	      && reg_overlap_mentioned_p (src, PATTERN (p)))
+	  /* Don't change hard registers used by a call.  */
+	  || (CALL_P (p) && sregno < FIRST_PSEUDO_REGISTER
+	      && find_reg_fusage (p, USE, src))
 	  /* Don't change a USE of a register.  */
 	  || (GET_CODE (PATTERN (p)) == USE
 	      && reg_overlap_mentioned_p (src, XEXP (PATTERN (p), 0))))