From: Chris Lattner <sabre@nondot.org>
Date: Mon, 29 Mar 2004 19:51:24 +0000 (+0000)
Subject: Handle -0.0 correctly
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d25e3ecb3c3c9e14fef16d77e86039b3504bf960;p=oota-llvm.git

Handle -0.0 correctly


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12530 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/VMCore/Constants.cpp b/lib/VMCore/Constants.cpp
index 21f19b98b11..e1b0f18dc32 100644
--- a/lib/VMCore/Constants.cpp
+++ b/lib/VMCore/Constants.cpp
@@ -313,7 +313,10 @@ ConstantExpr::ConstantExpr(Constant *C, const std::vector<Constant*> &IdxList,
 /// specify the full Instruction::OPCODE identifier.
 ///
 Constant *ConstantExpr::getNeg(Constant *C) {
-  return get(Instruction::Sub, getNullValue(C->getType()), C);
+  if (!C->getType()->isFloatingPoint())
+    return get(Instruction::Sub, getNullValue(C->getType()), C);
+  else
+    return get(Instruction::Sub, ConstantFP::get(C->getType(), -0.0), C);
 }
 Constant *ConstantExpr::getNot(Constant *C) {
   assert(isa<ConstantIntegral>(C) && "Cannot NOT a nonintegral type!");