regrename.c (regrename_optimize): Do not rename registers to leaf registers.

* regrename.c (regrename_optimize): Do not rename registers to leaf registers. From-SVN: r42066

regrename.c (regrename_optimize): Do not rename registers to leaf registers.
* regrename.c (regrename_optimize): Do not rename registers to leaf registers. From-SVN: r42066
b2a8b026 · Mark Mitchell · Mark Mitchell · ce29729a · b2a8b026 · b2a8b026
Commit b2a8b026 authored May 14, 2001 by Mark Mitchell Committed by Mark Mitchell May 14, 2001
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gcc/ChangeLog
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gcc/regrename.c
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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
+2001-05-14  Mark Mitchell  <mark@codesourcery.com>
+
+	* regrename.c (regrename_optimize): Do not rename registers to
+	leaf registers.
+
 2001-05-14  Alexandre Oliva  <aoliva@redhat.com>

 	* rtl.texi (CALL_INSN_FUNCTION_USAGE): Note that (and when) it may

--- a/gcc/regrename.c
+++ b/gcc/regrename.c
@@ -292,6 +292,12 @@ regrename_optimize ()
 		    /* Can't use regs which aren't saved by the prologue.  */
 		    || (! regs_ever_live[new_reg + i]
 			&& ! call_used_regs[new_reg + i])
+#ifdef LEAF_REGISTERS
+		    /* We can't use a non-leaf register if we're in a 
+		       leaf function.  */
+		    || (current_function_is_leaf 
+			&& !LEAF_REGISTERS[new_reg + i])
+#endif
 #ifdef HARD_REGNO_RENAME_OK
 		    || ! HARD_REGNO_RENAME_OK (reg + i, new_reg + i)
 #endif