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Re: [vta, vta4.4] handle more RTL codes in dwarf2 location expressions

From: Paolo Bonzini <paolo dot bonzini at gmail dot com>
To: Jakub Jelinek <jakub at redhat dot com>
Cc: Alexandre Oliva <aoliva at redhat dot com>, gcc-patches at gcc dot gnu dot org
Date: Wed, 17 Jun 2009 10:51:57 +0200
Subject: Re: [vta, vta4.4] handle more RTL codes in dwarf2 location expressions
References: <orvdmv1f0c.fsf@free.oliva.athome.lsd.ic.unicamp.br> <20090617084026.GJ4822@tyan-ft48-01.lab.bos.redhat.com>

+      /* DWARF cannot represent the unsigned compare operations
+	 natively.  */
+    case GEU:
+    case GTU:
+    case LEU:
+    case LTU:


I believe even the above unsigned ones can be expressed using signed
comparisons.

Yes, just subtract 0x80000000 from the operands and do the corresponding signed comparison.

Paolo

References:
- [vta, vta4.4] handle more RTL codes in dwarf2 location expressions
  - From: Alexandre Oliva
- Re: [vta, vta4.4] handle more RTL codes in dwarf2 location expressions
  - From: Jakub Jelinek

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