add an instcombine pass to clean up after heavy-lifting IP passes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33843 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/gccld/GenerateCode.cpp b/tools/gccld/GenerateCode.cpp
index db1caa8..e70bda3 100644
--- a/tools/gccld/GenerateCode.cpp
+++ b/tools/gccld/GenerateCode.cpp
@@ -239,6 +239,12 @@
// Remove unused arguments from functions...
addPass(Passes, createDeadArgEliminationPass());
+ // Reduce the code after globalopt and ipsccp. Both can open up significant
+ // simplification opportunities, and both can propagate functions through
+ // function pointers. When this happens, we often have to resolve varargs
+ // calls, etc, so let instcombine do this.
+ addPass(Passes, createInstructionCombiningPass());
+
if (!DisableInline)
addPass(Passes, createFunctionInliningPass()); // Inline small functions