[llvm-commits] [llvm] r99348 - /llvm/trunk/lib/MC/MCExpr.cpp

[Daniel Dunbar]

Author: ddunbar
Date: Tue Mar 23 18:47:07 2010
New Revision: 99348

URL: http://llvm.org/viewvc/llvm-project?rev=99348&view=rev
Log:
llvm-mc: Fast path EvaluateAbsolute of constants.

Modified:
    llvm/trunk/lib/MC/MCExpr.cpp

Modified: llvm/trunk/lib/MC/MCExpr.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCExpr.cpp?rev=99348&r1=99347&r2=99348&view=diff
==============================================================================
--- llvm/trunk/lib/MC/MCExpr.cpp (original)
+++ llvm/trunk/lib/MC/MCExpr.cpp Tue Mar 23 18:47:07 2010
@@ -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;