From: Mark Mitchell <mark@codesourcery.com>
Date: Tue, 4 May 1999 16:02:07 +0000 (+0000)
Subject: resource.c (mark_set_resources): Handle UNSPEC_VOLATILE...
X-Git-Tag: prereleases/gcc-2.95-test~633
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=3d298f8f0e3934f7951b13281976bb9eda021387;p=thirdparty%2Fgcc.git

resource.c (mark_set_resources): Handle UNSPEC_VOLATILE...

	* resource.c (mark_set_resources): Handle UNSPEC_VOLATILE,
	ASM_INPUT, TRAP_IF, and ASM_OPERANDS just like in
	mark_referenced_resources.

From-SVN: r26769
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 68dd128a47da..fab7d58835d6 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+Tue May  4 13:17:55 1999  Mark Mitchell  <mark@codesourcery.com>
+
+	* resource.c (mark_set_resources): Handle UNSPEC_VOLATILE,
+	ASM_INPUT, TRAP_IF, and ASM_OPERANDS just like in
+	mark_referenced_resources.
+
 Mon May  3 22:38:41 1999  David Edelsohn  <edelsohn@gnu.org>
 
 	* rs6000/aix43.h (SUBTARGET_OVERRIDE_OPTIONS): Change non-PowerPC
diff --git a/gcc/resource.c b/gcc/resource.c
index eceac56df90c..bc214a3dc231 100644
--- a/gcc/resource.c
+++ b/gcc/resource.c
@@ -739,6 +739,28 @@ mark_set_resources (x, res, in_dest, include_delayed_effects)
 	  SET_HARD_REG_BIT (res->regs, REGNO (x) + i);
       return;
 
+    case UNSPEC_VOLATILE:
+    case ASM_INPUT:
+      /* Traditional asm's are always volatile.  */
+      res->volatil = 1;
+      return;
+
+    case TRAP_IF:
+      res->volatil = 1;
+      break;
+
+    case ASM_OPERANDS:
+      res->volatil = MEM_VOLATILE_P (x);
+
+      /* For all ASM_OPERANDS, we must traverse the vector of input operands.
+	 We can not just fall through here since then we would be confused
+	 by the ASM_INPUT rtx inside ASM_OPERANDS, which do not indicate
+	 traditional asms unlike their normal usage.  */
+      
+      for (i = 0; i < ASM_OPERANDS_INPUT_LENGTH (x); i++)
+	mark_set_resources (ASM_OPERANDS_INPUT (x, i), res, in_dest, 0);
+      return;
+
     default:
       break;
     }