From: Tom Stellard <thomas.stellard@amd.com>
Date: Wed, 23 Oct 2013 03:50:25 +0000 (+0000)
Subject: R600/SI: Replace ffs(x) - 1 with countTrailingZeros(x)
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=9242b73286f050c53a26225b2a9acd14aeaa91da;p=oota-llvm.git

R600/SI: Replace ffs(x) - 1 with countTrailingZeros(x)

ffs(x) broke the mingw buildbot.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193225 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/R600/SIISelLowering.cpp b/lib/Target/R600/SIISelLowering.cpp
index b37d5b282b2..371572e31a1 100644
--- a/lib/Target/R600/SIISelLowering.cpp
+++ b/lib/Target/R600/SIISelLowering.cpp
@@ -1115,7 +1115,7 @@ void SITargetLowering::adjustWritemask(MachineSDNode *&Node,
     unsigned Comp;
     for (unsigned i = 0, Dmask = OldDmask; i <= Lane; i++) {
       assert(Dmask);
-      Comp = ffs(Dmask)-1;
+      Comp = countTrailingZeros(Dmask);
       Dmask &= ~(1 << Comp);
     }