commit 35b992207f18582b5339aa5493054b42d32b82ee
author Dan Gohman <djg@cray.com> Mon Oct 22 20:22:24 2007 +0000
committer Dan Gohman <djg@cray.com> Mon Oct 22 20:22:24 2007 +0000
tree 3001a6ca933b91076142672283624f87cfdda81a
parent 282c6469e2f2ad15285c2627e4c3cb069668f814

Fix the folding of multiplication into addresses on x86, which was broken
by the recent {U,S}MUL_LOHI changes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43230 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/X86/X86ISelDAGToDAG.cpp

diff --git a/lib/Target/X86/X86ISelDAGToDAG.cpp b/lib/Target/X86/X86ISelDAGToDAG.cpp
index 853ac11..9b7808e 100644
--- a/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -681,6 +681,11 @@
       }
     break;
 
+  case ISD::SMUL_LOHI:
+  case ISD::UMUL_LOHI:
+    // A mul_lohi where we need the low part can be folded as a plain multiply.
+    if (N.ResNo != 0) break;
+    // FALL THROUGH
   case ISD::MUL:
     // X*[3,5,9] -> X+X*[2,4,8]
     if (!Available &&