[llvm-commits] [llvm] r42254 - /llvm/trunk/lib/VMCore/ConstantFold.cpp

[Dale Johannesen]

Author: johannes
Date: Sun Sep 23 19:32:45 2007
New Revision: 42254

URL: http://llvm.org/viewvc/llvm-project?rev=42254&view=rev
Log:
Just use APFloat for const / const.  Fixes
-1. / -0.

Modified:
    llvm/trunk/lib/VMCore/ConstantFold.cpp

Modified: llvm/trunk/lib/VMCore/ConstantFold.cpp
URL: 
http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/VMCore/ConstantFold.cpp?rev=42254&r1=42253&r2=42254&view=diff

==============================================================================
--- llvm/trunk/lib/VMCore/ConstantFold.cpp (original)
+++ llvm/trunk/lib/VMCore/ConstantFold.cpp Sun Sep 23 19:32:45 2007
@@ -699,23 +699,6 @@
         (void)C3V.multiply(C2V, APFloat::rmNearestTiesToEven);
         return ConstantFP::get(CFP1->getType(), C3V);
       case Instruction::FDiv:
-        // FIXME better to look at the return code
-        if (C2V.isZero())
-          if (C1V.isZero())
-            // IEEE 754, Section 7.1, #4
-            return ConstantFP::get(CFP1->getType(), isDouble ?
-                            APFloat(std::numeric_limits<double>::quiet_NaN()) :
-                            APFloat(std::numeric_limits<float>::quiet_NaN()));
-          else if (C2V.isNegZero() || C1V.isNegative())
-            // IEEE 754, Section 7.2, negative infinity case
-            return ConstantFP::get(CFP1->getType(), isDouble ?
-                            APFloat(-std::numeric_limits<double>::infinity()) :
-                            APFloat(-std::numeric_limits<float>::infinity()));
-          else
-            // IEEE 754, Section 7.2, positive infinity case
-            return ConstantFP::get(CFP1->getType(), isDouble ?
-                            APFloat(std::numeric_limits<double>::infinity()) :
-                            APFloat(std::numeric_limits<float>::infinity()));
         (void)C3V.divide(C2V, APFloat::rmNearestTiesToEven);
         return ConstantFP::get(CFP1->getType(), C3V);
       case Instruction::FRem:


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