llvm-objdump: Add -s, which prints the contents of each section.

[oota-llvm.git] / lib / Target / ARM / ARMGlobalMerge.cpp

diff --git a/lib/Target/ARM/ARMGlobalMerge.cpp b/lib/Target/ARM/ARMGlobalMerge.cpp
index 72cab6462c45de1c938666fc8ec86edb2c6ba505..5f863ea241ca8790e9f9697d90ad6093839ffafc 100644 (file)
--- a/lib/Target/ARM/ARMGlobalMerge.cpp
+++ b/lib/Target/ARM/ARMGlobalMerge.cpp
@@ -65,6 +65,7 @@
 #include "llvm/Pass.h"
 #include "llvm/Target/TargetData.h"
 #include "llvm/Target/TargetLowering.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
 using namespace llvm;
 
 namespace {
@@ -74,7 +75,7 @@ namespace {
     const TargetLowering *TLI;
 
     bool doMerge(SmallVectorImpl<GlobalVariable*> &Globals,
-                 Module &M, bool) const;
+                 Module &M, bool isConst) const;
 
   public:
     static char ID;             // Pass identification, replacement for typeid.
@@ -99,8 +100,8 @@ namespace {
       GlobalCmp(const TargetData *td) : TD(td) { }
 
       bool operator()(const GlobalVariable *GV1, const GlobalVariable *GV2) {
-        const Type *Ty1 = cast<PointerType>(GV1->getType())->getElementType();
-        const Type *Ty2 = cast<PointerType>(GV2->getType())->getElementType();
+        Type *Ty1 = cast<PointerType>(GV1->getType())->getElementType();
+        Type *Ty2 = cast<PointerType>(GV2->getType())->getElementType();
 
         return (TD->getTypeAllocSize(Ty1) < TD->getTypeAllocSize(Ty2));
       }
@@ -122,15 +123,15 @@ bool ARMGlobalMerge::doMerge(SmallVectorImpl<GlobalVariable*> &Globals,
   // FIXME: Find better heuristics
   std::stable_sort(Globals.begin(), Globals.end(), GlobalCmp(TD));
 
-  const Type *Int32Ty = Type::getInt32Ty(M.getContext());
+  Type *Int32Ty = Type::getInt32Ty(M.getContext());
 
   for (size_t i = 0, e = Globals.size(); i != e; ) {
     size_t j = 0;
     uint64_t MergedSize = 0;
-    std::vector<const Type*> Tys;
+    std::vector<Type*> Tys;
     std::vector<Constant*> Inits;
     for (j = i; j != e; ++j) {
-      const Type *Ty = Globals[j]->getType()->getElementType();
+      Type *Ty = Globals[j]->getType()->getElementType();
       MergedSize += TD->getTypeAllocSize(Ty);
       if (MergedSize > MaxOffset) {
         break;
@@ -149,7 +150,7 @@ bool ARMGlobalMerge::doMerge(SmallVectorImpl<GlobalVariable*> &Globals,
         ConstantInt::get(Int32Ty, 0),
         ConstantInt::get(Int32Ty, k-i)
       };
-      Constant *GEP = ConstantExpr::getInBoundsGetElementPtr(MergedGV, Idx, 2);
+      Constant *GEP = ConstantExpr::getInBoundsGetElementPtr(MergedGV, Idx);
       Globals[k]->replaceAllUsesWith(GEP);
       Globals[k]->eraseFromParent();
     }
@@ -161,7 +162,7 @@ bool ARMGlobalMerge::doMerge(SmallVectorImpl<GlobalVariable*> &Globals,
 
 
 bool ARMGlobalMerge::doInitialization(Module &M) {
-  SmallVector<GlobalVariable*, 16> Globals, ConstGlobals;
+  SmallVector<GlobalVariable*, 16> Globals, ConstGlobals, BSSGlobals;
   const TargetData *TD = TLI->getTargetData();
   unsigned MaxOffset = TLI->getMaximalGlobalOffset();
   bool Changed = false;
@@ -174,7 +175,9 @@ bool ARMGlobalMerge::doInitialization(Module &M) {
       continue;
 
     // Ignore fancy-aligned globals for now.
-    if (I->getAlignment() != 0)
+    unsigned Alignment = I->getAlignment();
+    Type *Ty = I->getType()->getElementType();
+    if (Alignment > TD->getABITypeAlignment(Ty))
       continue;
 
     // Ignore all 'special' globals.
@@ -182,8 +185,11 @@ bool ARMGlobalMerge::doInitialization(Module &M) {
         I->getName().startswith(".llvm."))
       continue;
 
-    if (TD->getTypeAllocSize(I->getType()->getElementType()) < MaxOffset) {
-      if (I->isConstant())
+    if (TD->getTypeAllocSize(Ty) < MaxOffset) {
+      const TargetLoweringObjectFile &TLOF = TLI->getObjFileLowering();
+      if (TLOF.getKindForGlobal(I, TLI->getTargetMachine()).isBSSLocal())
+        BSSGlobals.push_back(I);
+      else if (I->isConstant())
         ConstGlobals.push_back(I);
       else
         Globals.push_back(I);
@@ -192,10 +198,12 @@ bool ARMGlobalMerge::doInitialization(Module &M) {
 
   if (Globals.size() > 1)
     Changed |= doMerge(Globals, M, false);
+  if (BSSGlobals.size() > 1)
+    Changed |= doMerge(BSSGlobals, M, false);
+
   // FIXME: This currently breaks the EH processing due to way how the 
   // typeinfo detection works. We might want to detect the TIs and ignore 
   // them in the future.
-  
   // if (ConstGlobals.size() > 1)
   //  Changed |= doMerge(ConstGlobals, M, true);