[llvm-commits] CVS: llvm/tools/gccas/gccas.cpp

[Chris Lattner]

Changes in directory llvm/tools/gccas:

gccas.cpp updated: 1.97 -> 1.98

---
Log message:

Remove redundant SCCP pass
Add new DSE pass.  Add a temporary option to disable it in case we need it
This is going in after the July 22 nightly tester run, so we'll wait until the 23rd to see it
:)



---
Diffs of the changes:  (+5 -1)

Index: llvm/tools/gccas/gccas.cpp
diff -u llvm/tools/gccas/gccas.cpp:1.97 llvm/tools/gccas/gccas.cpp:1.98
--- llvm/tools/gccas/gccas.cpp:1.97	Thu May 27 00:40:58 2004
+++ llvm/tools/gccas/gccas.cpp	Thu Jul 22 03:34:33 2004
@@ -46,6 +46,9 @@
   cl::opt<bool>
   DisableOptimizations("disable-opt",
                        cl::desc("Do not run any optimization passes"));
+
+  cl::opt<bool>
+  DisableDSE("disable-dse", cl::desc("Do not run dead store elimination"));
 }
 
 
@@ -99,11 +102,12 @@
   addPass(PM, createLoadValueNumberingPass());   // GVN for load instructions
   addPass(PM, createGCSEPass());                 // Remove common subexprs
   addPass(PM, createSCCPPass());                 // Constant prop with SCCP
-  addPass(PM, createSCCPPass());                 // Constant prop with SCCP
 
   // Run instcombine after redundancy elimination to exploit opportunities
   // opened up by them.
   addPass(PM, createInstructionCombiningPass());
+  if (!DisableDSE)
+    addPass(PM, createDeadStoreEliminationPass()); // Delete dead stores
   addPass(PM, createAggressiveDCEPass());        // SSA based 'Aggressive DCE'
   addPass(PM, createCFGSimplificationPass());    // Merge & remove BBs
   addPass(PM, createDeadTypeEliminationPass());  // Eliminate dead types