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

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
53b6fb26 · Richard Kenner · Richard Kenner · c24ae149 · 53b6fb26 · 53b6fb26
Commit 53b6fb26 authored Dec 05, 2001 by Richard Kenner Committed by Richard Kenner Dec 05, 2001
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gcc/ChangeLog
+3 -0

gcc/function.c
+2 -1

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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
 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.

--- 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;