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

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
97b69e51 · Daniel Jacobowitz · Daniel Jacobowitz · a9315f66 · 97b69e51 · 97b69e51
Commit 97b69e51 authored 20 years ago by Daniel Jacobowitz Committed by Daniel Jacobowitz 20 years ago
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gcc/ChangeLog
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gcc/regmove.c
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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
+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):

--- 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))))