From 87b84a691394e10a04efd7450e521eeaa768d143 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Wed, 30 Oct 2002 01:15:31 +0000
Subject: [PATCH] Set the destination register field based on the target
 specific flags

llvm-svn: 4442
---
 llvm/lib/Target/X86/X86InstrInfo.cpp | 7 +++++--
 llvm/lib/Target/X86/X86InstrInfo.def | 4 ++++
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/Target/X86/X86InstrInfo.cpp b/llvm/lib/Target/X86/X86InstrInfo.cpp
index 6d2bf1d49697..c81ddb19003e 100644
--- a/llvm/lib/Target/X86/X86InstrInfo.cpp
+++ b/llvm/lib/Target/X86/X86InstrInfo.cpp
@@ -12,8 +12,11 @@
 // descriptors
 //
 static const MachineInstrDescriptor X86Insts[] = {
-#define I(ENUM, NAME, FLAGS, TSFLAGS) \
-             { NAME, -1, -1, 0, false, 0, 0, TSFLAGS, FLAGS },
+#define I(ENUM, NAME, FLAGS, TSFLAGS)   \
+             { NAME,                    \
+               -1, /* Always vararg */  \
+               ((TSFLAGS) & X86II::Void) ? -1 : 0,  /* Result is in 0 */ \
+               0, false, 0, 0, TSFLAGS, FLAGS, TSFLAGS },
 #include "X86InstrInfo.def"
 };
 
diff --git a/llvm/lib/Target/X86/X86InstrInfo.def b/llvm/lib/Target/X86/X86InstrInfo.def
index bd4e47be4d37..2388b9bf38d2 100644
--- a/llvm/lib/Target/X86/X86InstrInfo.def
+++ b/llvm/lib/Target/X86/X86InstrInfo.def
@@ -5,6 +5,10 @@
 // specified below, and is used to make all of the information relevant to an
 // instruction be in one place.
 //
+// Note that X86 Instructions always have the destination register listed as
+// operand 0, unless it does not produce a value (in which case the TSFlags will
+// include X86II::Void).
+//
 //===----------------------------------------------------------------------===//
 
 // NOTE: No include guards desired