From 5db322acefc3089c133b8f3a33fa0a3ce90e2001 Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Thu, 5 Jul 2007 07:05:38 +0000
Subject: [PATCH] Better assertion messages.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37890 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/RegisterScavenging.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/lib/CodeGen/RegisterScavenging.cpp b/lib/CodeGen/RegisterScavenging.cpp
index 1555a63727a..ae40e58d032 100644
--- a/lib/CodeGen/RegisterScavenging.cpp
+++ b/lib/CodeGen/RegisterScavenging.cpp
@@ -110,7 +110,7 @@ void RegScavenger::forward() {
     if (!isUsed(Reg)) {
       // Register has been scavenged. Restore it!
       if (Reg != ScavengedReg)
-        assert(false);
+        assert(false && "Using an undefined register!");
       else
         restoreScavengedReg();
     }
@@ -135,10 +135,11 @@ void RegScavenger::forward() {
     }
     // Skip two-address destination operand.
     if (TID->findTiedToSrcOperand(i) != -1) {
-      assert(isUsed(Reg));
+      assert(isUsed(Reg) && "Using an undefined register!");
       continue;
     }
-    assert(isUnused(Reg) || isReserved(Reg));
+    assert((isUnused(Reg) || isReserved(Reg)) &&
+           "Re-defining a live register!");
     setUsed(Reg);
   }
 }