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We can do cast-add elimination even on casts that reinterpret
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1427 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -51,7 +51,6 @@ static inline bool isReinterpretingCast(const CastInst *CI) {
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#if 0 // Unneccesary code, handled by convert exprs
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// Peephole optimize the following instructions:
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// %t1 = cast ? to x *
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// %t2 = add x * %SP, %t1 ;; Constant must be 2nd operand
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@ -117,8 +116,7 @@ static bool HandleCastToPointer(BasicBlock::iterator BI,
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OtherPtr = C;
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}
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GetElementPtrInst *GEP = new GetElementPtrInst(OtherPtr, Indices,
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I->getName());
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GetElementPtrInst *GEP = new GetElementPtrInst(OtherPtr, Indices);
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PRINT_PEEPHOLE1("cast-add-to-gep:i", I);
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@ -128,7 +126,6 @@ static bool HandleCastToPointer(BasicBlock::iterator BI,
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}
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return true;
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}
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#endif
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// Peephole optimize the following instructions:
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// %t1 = cast ulong <const int> to {<...>} *
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@ -269,16 +266,17 @@ static bool PeepholeOptimize(BasicBlock *BB, BasicBlock::iterator &BI) {
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#endif
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return true;
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}
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#if 0
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// Otherwise find out it this cast is a cast to a pointer type, which is
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// then added to some other pointer, then loaded or stored through. If
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// so, convert the add into a getelementptr instruction...
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//
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if (const PointerType *DestPTy = dyn_cast<PointerType>(DestTy)) {
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if (HandleCastToPointer(BI, DestPTy))
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return true;
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}
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// Otherwise find out it this cast is a cast to a pointer type, which is
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// then added to some other pointer, then loaded or stored through. If
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// so, convert the add into a getelementptr instruction...
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//
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if (const PointerType *DestPTy = dyn_cast<PointerType>(DestTy)) {
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if (HandleCastToPointer(BI, DestPTy)) {
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BI = BB->begin(); // Rescan basic block. BI might be invalidated.
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return true;
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}
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#endif
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}
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// Check to see if we are casting from a structure pointer to a pointer to
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