From: Chris Lattner <sabre@nondot.org>
Date: Fri, 21 Nov 2003 21:44:35 +0000 (+0000)
Subject: Reorder passes a bit.  In particular, it makes sense to run globaldce IMMEDIATELY... 
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=14b170f5ffaf64090b788b004b09740905aa2711;p=oota-llvm.git

Reorder passes a bit.  In particular, it makes sense to run globaldce IMMEDIATELY after funcresolve.  Also, run the mem2reg pass _early_ so that IPCP and DAE actually do stuff.
Run instcombine and simplify cfg after this to cleanup the intraprocedural messes we create.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10134 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/tools/gccas/gccas.cpp b/tools/gccas/gccas.cpp
index 0ed58b97db5..7d44d00a55b 100644
--- a/tools/gccas/gccas.cpp
+++ b/tools/gccas/gccas.cpp
@@ -58,11 +58,13 @@ void AddConfiguredTransformationPasses(PassManager &PM) {
   PM.add(createVerifierPass());                  // Verify that input is correct
   addPass(PM, createLowerSetJmpPass());          // Lower llvm.setjmp/.longjmp
   addPass(PM, createFunctionResolvingPass());    // Resolve (...) functions
-  addPass(PM, createCFGSimplificationPass());    // Clean up disgusting code
-  addPass(PM, createRaiseAllocationsPass());     // call %malloc -> malloc inst
   addPass(PM, createGlobalDCEPass());            // Remove unused globals
+  addPass(PM, createRaiseAllocationsPass());     // call %malloc -> malloc inst
+  addPass(PM, createPromoteMemoryToRegister());  // "Construct SSA form"
   addPass(PM, createIPConstantPropagationPass());// IP Constant Propagation
   addPass(PM, createDeadArgEliminationPass());   // Dead argument elimination
+  addPass(PM, createInstructionCombiningPass()); // Cleanup after IPCP & DAE
+  addPass(PM, createCFGSimplificationPass());    // Clean up disgusting code
 
   addPass(PM, createPruneEHPass());              // Remove dead EH info