[InstCombineAddSub.cpp] Corrected Formatting and Indentation

[ankur29.garg]

Summary

Corrected Indentation of the Function visitSub and visitFSub

[suyog]

Few comments inline.
I would suggest to re-direct it to someone who is more familiar with clang-format.

lib/Transforms/InstCombine/InstCombineAddSub.cpp

1525

Removing this extra space is Ok.

1598

This is Ok.

1601

Not sure if this change is ok. Comment in between confuses things.
clang-format may consider to include extra space.
I would suggest to leave it like as it is.

1606

Not sure if this change is ok. Comment in between confuses things.
clang-format may consider to include extra space.
I would suggest to leave it like as it is, with space padding for '-1'

1613

This is ok.

1633

Not sure if this is Ok.

1640

Not sure if this is Ok.

1704

Not sure if this is ok.

[ankur29.garg]

Made the changes as per your comments. Please review. Thanks.

[suyog]

LGTM

[ankur29.garg]

Thanks.

[suyog]

committed in r219286.
Thanks !

lib/Transforms/InstCombine/InstCombineAddSub.cpp

if (match(LHS, m_Select(m_Value(C1), m_Value(A1), m_Value(B1))) &&
       if (C1 == C2) {
         Constant *Z1=nullptr, *Z2=nullptr;
         Value *A, *B, *C=C1;
         if (match(A1, m_AnyZero()) && match(B2, m_AnyZero())) {
             Z1 = dyn_cast<Constant>(A1); A = A2;
             Z2 = dyn_cast<Constant>(B2); B = B1;
         } else if (match(B1, m_AnyZero()) && match(A2, m_AnyZero())) {
             Z1 = dyn_cast<Constant>(B1); B = B2;
-            Z2 = dyn_cast<Constant>(A2); A = A1; 
+            Z2 = dyn_cast<Constant>(A2); A = A1;
         }
-        
-        if (Z1 && Z2 && 
-            (I.hasNoSignedZeros() || 
+        if (Z1 && Z2 &&
+            (I.hasNoSignedZeros() ||
              (Z1->isNegativeZeroValue() && Z2->isNegativeZeroValue()))) {
           return SelectInst::Create(C, A, B);
         }
       }
     }
   }
 
   if (I.hasUnsafeAlgebra()) {
Value *InstCombiner::OptimizePointerDifference(Value *LHS, Value *RHS,
 
   // If we have p - gep(p, ...)  then we have to negate the result.
   if (Swapped)
     Result = Builder->CreateNeg(Result, "diff.neg");
 
   return Builder->CreateIntCast(Result, Ty, true);
 }
 
-
 Instruction *InstCombiner::visitSub(BinaryOperator &I) {
   Value *Op0 = I.getOperand(0), *Op1 = I.getOperand(1);
 
   if (Value *V = SimplifyVectorOp(I))
     return ReplaceInstUsesWith(I, V);
 
   if (Value *V = SimplifySubInst(Op0, Op1, I.hasNoSignedWrap(),
                                  I.hasNoUnsignedWrap(), DL, TLI, DT, AT))
if (C->isNullValue() && match(Op1, m_SExt(m_Value(X))))
       if (X->getType()->getScalarType()->isIntegerTy(1))
         return CastInst::CreateZExtOrBitCast(X, Op1->getType());
   }
 
   if (ConstantInt *C = dyn_cast<ConstantInt>(Op0)) {
     // -(X >>u 31) -> (X >>s 31)
     // -(X >>s 31) -> (X >>u 31)
     if (C->isZero()) {
-      Value *X; ConstantInt *CI;
+      Value *X;
+      ConstantInt *CI;
       if (match(Op1, m_LShr(m_Value(X), m_ConstantInt(CI))) &&
           // Verify we are shifting out everything but the sign bit.
-          CI->getValue() == I.getType()->getPrimitiveSizeInBits()-1)
+          CI->getValue() == I.getType()->getPrimitiveSizeInBits() - 1)
         return BinaryOperator::CreateAShr(X, CI);
 
       if (match(Op1, m_AShr(m_Value(X), m_ConstantInt(CI))) &&
           // Verify we are shifting out everything but the sign bit.
-          CI->getValue() == I.getType()->getPrimitiveSizeInBits()-1)
+          CI->getValue() == I.getType()->getPrimitiveSizeInBits() - 1)
         return BinaryOperator::CreateLShr(X, CI);
     }
   }
 
 
-  { Value *Y;
+  {
+    Value *Y;
     // X-(X+Y) == -Y    X-(Y+X) == -Y
     if (match(Op1, m_Add(m_Specific(Op0), m_Value(Y))) ||
         match(Op1, m_Add(m_Value(Y), m_Specific(Op0))))
       return BinaryOperator::CreateNeg(Y);
 
     // (X-Y)-X == -Y
     if (match(Op0, m_Sub(m_Specific(Op1), m_Value(Y))))
       return BinaryOperator::CreateNeg(Y);
   }
 
   if (Op1->hasOneUse()) {
     Value *X = nullptr, *Y = nullptr, *Z = nullptr;
     Constant *C = nullptr;
     Constant *CI = nullptr;
 
     // (X - (Y - Z))  -->  (X + (Z - Y)).
     if (match(Op1, m_Sub(m_Value(Y), m_Value(Z))))
       return BinaryOperator::CreateAdd(Op0,
                                       Builder->CreateSub(Z, Y, Op1->getName()));
 
     // (X - (X & Y))   -->   (X & ~Y)
     //
     if (match(Op1, m_And(m_Value(Y), m_Specific(Op0))) ||
         match(Op1, m_And(m_Specific(Op0), m_Value(Y))))
       return BinaryOperator::CreateAnd(Op0,
                                   Builder->CreateNot(Y, Y->getName() + ".not"));
 
     // 0 - (X sdiv C)  -> (X sdiv -C)  provided the negation doesn't overflow.
     if (match(Op1, m_SDiv(m_Value(X), m_Constant(C))) && match(Op0, m_Zero()) &&
         C->isNotMinSignedValue() && !C->isOneValue())
       return BinaryOperator::CreateSDiv(X, ConstantExpr::getNeg(C));
 
     // 0 - (X << Y)  -> (-X << Y)   when X is freely negatable.
     if (match(Op1, m_Shl(m_Value(X), m_Value(Y))) && match(Op0, m_Zero()))
       if (Value *XNeg = dyn_castNegVal(X))

 Instruction *InstCombiner::visitFSub(BinaryOperator &I) {
   Value *Op0 = I.getOperand(0), *Op1 = I.getOperand(1);
 
   if (Value *V = SimplifyVectorOp(I))
     return ReplaceInstUsesWith(I, V);
 
   if (Value *V = SimplifyFSubInst(Op0, Op1, I.getFastMathFlags(), DL,
                                   TLI, DT, AT))
     return ReplaceInstUsesWith(I, V);
 
   if (isa<Constant>(Op0))
     if (SelectInst *SI = dyn_cast<SelectInst>(Op1))
       if (Instruction *NV = FoldOpIntoSelect(I, SI))
         return NV;
 
   // If this is a 'B = x-(-A)', change to B = x+A, potentially looking
   // through FP extensions/truncations along the way.