commit ef6e96f91fd812ba9ead6fdef3975abb1139c123
author Daniel Dunbar <daniel@zuster.org> Tue Mar 23 23:47:07 2010 +0000
committer Daniel Dunbar <daniel@zuster.org> Tue Mar 23 23:47:07 2010 +0000
tree 90883618d5ceb4b13532588726772c8d9b50ce9f
parent 9972aff7da15e5019b7cf6d0cc6dde0cd6192360

llvm-mc: Fast path EvaluateAbsolute of constants.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99348 91177308-0d34-0410-b5e6-96231b3b80d8

lib/MC/MCExpr.cpp

diff --git a/lib/MC/MCExpr.cpp b/lib/MC/MCExpr.cpp
index 2759944..d0025f3 100644
--- a/lib/MC/MCExpr.cpp
+++ b/lib/MC/MCExpr.cpp
@@ -194,6 +194,12 @@
 bool MCExpr::EvaluateAsAbsolute(int64_t &Res, const MCAsmLayout *Layout) const {
   MCValue Value;
 
+  // Fast path constants.
+  if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(this)) {
+    Res = CE->getValue();
+    return true;
+  }
+
   if (!EvaluateAsRelocatable(Value, Layout) || !Value.isAbsolute())
     return false;