* rtlanal.c (reg_set_p): Add check for regs_invalidated_by_call.

From-SVN: r84930

* rtlanal.c (reg_set_p): Add check for regs_invalidated_by_call.
From-SVN: r84930
4f1605d2 · Roger Sayle · Roger Sayle · fab62285 · 4f1605d2 · 4f1605d2
Commit 4f1605d2 authored Jul 19, 2004 by Roger Sayle Committed by Roger Sayle Jul 19, 2004
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gcc/ChangeLog
+4 -0

gcc/rtlanal.c
+3 -7

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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
+2004-07-19  Roger Sayle  <roger@eyesopen.com>
+
+	* rtlanal.c (reg_set_p): Add check for regs_invalidated_by_call.
+
 2004-07-19  Jeff Law  <law@redhat.com>

 	* tree-ssa-dom.c (single_incoming_edge_ignoring_loop_edges): New.

--- a/gcc/rtlanal.c
+++ b/gcc/rtlanal.c
@@ -941,14 +941,10 @@ reg_set_p (rtx reg, rtx insn)
  if (INSN_P (insn)
      && (FIND_REG_INC_NOTE (insn, reg)
 	  || (CALL_P (insn)
-	      /* We'd like to test call_used_regs here, but rtlanal.c can't
-		 reference that variable due to its use in genattrtab.  So
-		 we'll just be more conservative.
-
-		 ??? Unless we could ensure that the CALL_INSN_FUNCTION_USAGE
-		 information holds all clobbered registers.  */
 	      && ((REG_P (reg)
-		   && REGNO (reg) < FIRST_PSEUDO_REGISTER)
+		   && REGNO (reg) < FIRST_PSEUDO_REGISTER
+		   && TEST_HARD_REG_BIT (regs_invalidated_by_call,
+					 REGNO (reg)))
 		  || MEM_P (reg)
 		  || find_reg_fusage (insn, CLOBBER, reg)))))
    return 1;