From: Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
Date: Wed, 5 Dec 2001 11:49:24 +0000 (+0000)
Subject: function.c (keep_stack_depressed): Refine check for register clobbered over call.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=53b6fb26fcd1f4f399d1fa96053b9a6c108abc68;p=gcc.git

function.c (keep_stack_depressed): Refine check for register clobbered over call.

	* function.c (keep_stack_depressed): Refine check for register
	clobbered over call.

From-SVN: r47664
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2476e327b5e..2ef81affa6b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,8 @@
 Wed Dec  5 06:26:27 2001  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
 
+	* function.c (keep_stack_depressed): Refine check for register
+	clobbered over call.
+
 	* expr.c (store_expr): When copying string constant into array,
 	use functions that update memrefs instead of computations on
 	addresses to better track MEMs.  Also properly handle 32/64 pointers.
diff --git a/gcc/function.c b/gcc/function.c
index 653e2abe140..3e7bf6ea530 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -7274,7 +7274,8 @@ keep_stack_depressed (seq)
 
 	      for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
 		if (HARD_REGNO_MODE_OK (regno, Pmode)
-		    && !fixed_regs[regno] && call_used_regs[regno]
+		    && !fixed_regs[regno]
+		    && TEST_HARD_REG_BIT (regs_invalidated_by_call, regno)
 		    && !FUNCTION_VALUE_REGNO_P (regno))
 		  break;