[InstCombine] reduce code duplication; NFC

Follow-up to:
rL359482

Avoid this potential problem throughout by giving the type a name
and verifying the assumption that both operands are the same type.

llvm-svn: 359485

diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
index b27ddb7..7880067 100644 (file)
--- a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
@@ -5481,6 +5481,8 @@ Instruction *InstCombiner::visitFCmpInst(FCmpInst &I) {
     return replaceInstUsesWith(I, V);
 
   // Simplify 'fcmp pred X, X'
+  Type *OpType = Op0->getType();
+  assert(OpType == Op1->getType() && "fcmp with different-typed operands?");
   if (Op0 == Op1) {
     switch (Pred) {
       default: break;
@@ -5490,7 +5492,7 @@ Instruction *InstCombiner::visitFCmpInst(FCmpInst &I) {
     case FCmpInst::FCMP_UNE:    // True if unordered or not equal
       // Canonicalize these to be 'fcmp uno %X, 0.0'.
       I.setPredicate(FCmpInst::FCMP_UNO);
-      I.setOperand(1, Constant::getNullValue(Op0->getType()));
+      I.setOperand(1, Constant::getNullValue(OpType));
       return &I;
 
     case FCmpInst::FCMP_ORD:    // True if ordered (no nans)
@@ -5499,7 +5501,7 @@ Instruction *InstCombiner::visitFCmpInst(FCmpInst &I) {
     case FCmpInst::FCMP_OLE:    // True if ordered and less than or equal
       // Canonicalize these to be 'fcmp ord %X, 0.0'.
       I.setPredicate(FCmpInst::FCMP_ORD);
-      I.setOperand(1, Constant::getNullValue(Op0->getType()));
+      I.setOperand(1, Constant::getNullValue(OpType));
       return &I;
     }
   }
@@ -5508,11 +5510,11 @@ Instruction *InstCombiner::visitFCmpInst(FCmpInst &I) {
   // then canonicalize the operand to 0.0.
   if (Pred == CmpInst::FCMP_ORD || Pred == CmpInst::FCMP_UNO) {
     if (!match(Op0, m_PosZeroFP()) && isKnownNeverNaN(Op0, &TLI)) {
-      I.setOperand(0, ConstantFP::getNullValue(Op0->getType()));
+      I.setOperand(0, ConstantFP::getNullValue(OpType));
       return &I;
     }
     if (!match(Op1, m_PosZeroFP()) && isKnownNeverNaN(Op1, &TLI)) {
-      I.setOperand(1, ConstantFP::getNullValue(Op1->getType()));
+      I.setOperand(1, ConstantFP::getNullValue(OpType));
       return &I;
     }
   }
@@ -5535,7 +5537,7 @@ Instruction *InstCombiner::visitFCmpInst(FCmpInst &I) {
   // The sign of 0.0 is ignored by fcmp, so canonicalize to +0.0:
   // fcmp Pred X, -0.0 --> fcmp Pred X, 0.0
   if (match(Op1, m_AnyZeroFP()) && !match(Op1, m_PosZeroFP())) {
-    I.setOperand(1, ConstantFP::getNullValue(Op1->getType()));
+    I.setOperand(1, ConstantFP::getNullValue(OpType));
     return &I;
   }