don't run GVN at -O1, GCC doesn't do it's equivalent at that optimization level.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91886 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/Support/StandardPasses.h b/include/llvm/Support/StandardPasses.h
index 18be1addbf9d0a776518a9cf8f729cdd285bed5d..f233c18de3ba152a744af5d3cf1a0449cd57beec 100644 (file)
--- a/include/llvm/Support/StandardPasses.h
+++ b/include/llvm/Support/StandardPasses.h
@@ -137,7 +137,8 @@ namespace llvm {
     if (UnrollLoops)
       PM->add(createLoopUnrollPass());          // Unroll small loops
     PM->add(createInstructionCombiningPass());  // Clean up after the unroller
-    PM->add(createGVNPass());                   // Remove redundancies
+    if (OptimizationLevel > 1)
+      PM->add(createGVNPass());                 // Remove redundancies
     PM->add(createMemCpyOptPass());             // Remove memcpy / form memset
     PM->add(createSCCPPass());                  // Constant prop with SCCP