From: Mike Danes <onemihaid@hotmail.com>
Date: Tue, 17 Nov 2015 18:22:56 +0000 (+0200)
Subject: Ifdef out useless code
X-Git-Tag: accepted/tizen/base/20180629.140029~6144^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=655e5dabce50378be3347486ed9de2b9d524ef36;p=platform%2Fupstream%2Fcoreclr.git

Ifdef out useless code

In 64 bit builds Lowering::DecompNodeHelper does nothing so walking the trees is pointless.  Profiling indicates that this accounts for 0.5% of the mscorlib crossgen time.
---

diff --git a/src/jit/lower.cpp b/src/jit/lower.cpp
index d94b0ba..2119da3 100644
--- a/src/jit/lower.cpp
+++ b/src/jit/lower.cpp
@@ -3417,7 +3417,9 @@ void Lowering::DoPhase()
             }
 #endif
             comp->compCurStmt = stmt;
+#if !defined(_TARGET_64BIT_)
             comp->fgWalkTreePost(&stmt->gtStmt.gtStmtExpr, &Lowering::DecompNodeHelper, this, true);
+#endif
             comp->fgWalkTreePost(&stmt->gtStmt.gtStmtExpr, &Lowering::LowerNodeHelper, this, true);
             // We may have removed "stmt" in LowerNode().
             stmt = comp->compCurStmt;