On x86 favors folding short immediate into some arithmetic operations (e.g. add, and, xor, etc.) because materializing an immediate in a register is expensive in turns of code size.

e.g.
movl 4(%esp), %eax
addl $4, %eax

is 2 bytes shorter than

movl $4, %eax
addl 4(%esp), %eax


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60139 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 2 deletions

diff --git a/utils/TableGen/DAGISelEmitter.cpp b/utils/TableGen/DAGISelEmitter.cpp
index 3f86d2d..3674a13 100644
--- a/utils/TableGen/DAGISelEmitter.cpp
+++ b/utils/TableGen/DAGISelEmitter.cpp
@@ -522,8 +522,8 @@ public:
 
           if (NeedCheck) {
             std::string ParentName(RootName.begin(), RootName.end()-1);
-            emitCheck("CanBeFoldedBy(" + RootName + ".getNode(), " + ParentName +
-                      ".getNode(), N.getNode())");
+            emitCheck("IsLegalAndProfitableToFold(" + RootName +
+                      ".getNode(), " + ParentName + ".getNode(), N.getNode())");
           }
         }
       }