From 9f5f322a032cc22b5375cf698ac58fe7644547c0 Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Thu, 4 Jun 2009 23:43:29 +0000
Subject: [PATCH] Fix an erroneous check for isFNeg; the FNeg case is handled a
 few lines later on.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72904 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/CBackend/CBackend.cpp | 2 +-
 test/CodeGen/CBackend/fneg.ll    | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)
 create mode 100644 test/CodeGen/CBackend/fneg.ll

diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp
index ed3ff8171f2..5814d2750ed 100644
--- a/lib/Target/CBackend/CBackend.cpp
+++ b/lib/Target/CBackend/CBackend.cpp
@@ -2600,7 +2600,7 @@ void CWriter::visitBinaryOperator(Instruction &I) {
 
   // If this is a negation operation, print it out as such.  For FP, we don't
   // want to print "-0.0 - X".
-  if (BinaryOperator::isNeg(&I) || BinaryOperator::isFNeg(&I)) {
+  if (BinaryOperator::isNeg(&I)) {
     Out << "-(";
     writeOperand(BinaryOperator::getNegArgument(cast<BinaryOperator>(&I)));
     Out << ")";
diff --git a/test/CodeGen/CBackend/fneg.ll b/test/CodeGen/CBackend/fneg.ll
new file mode 100644
index 00000000000..68849b20c76
--- /dev/null
+++ b/test/CodeGen/CBackend/fneg.ll
@@ -0,0 +1,7 @@
+; RUN: llvm-as < %s | llc -march=c
+
+define void @func() nounwind {
+  entry:
+  %0 = fsub double -0.0, undef
+  ret void
+}