loplugin:simplifybool can't invert conditions involving float types

so revert some of the changes from

    commit 7a1c21e53fc4733a4bb52282ce0098fcc085ab0e
    loplugin:simplifybool for negation of comparison operator

Change-Id: I937d575b86c1e418805d399b0dc16ae91876b4fe
Reviewed-on: https://gerrit.libreoffice.org/45130
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Noel Grandin <noel.grandin@collabora.co.uk>

6 files changed, 20 insertions, 7 deletions

diff --git a/compilerplugins/clang/simplifybool.cxx b/compilerplugins/clang/simplifybool.cxx
index 260946a5fd98..9167014f8c84 100644
--- a/compilerplugins/clang/simplifybool.cxx
+++ b/compilerplugins/clang/simplifybool.cxx
@@ -142,6 +142,10 @@ bool SimplifyBool::VisitUnaryLNot(UnaryOperator const * expr) {
         // RecordType would require more smarts - we'd need to verify that an inverted operator actually existed
         if (t->isTemplateTypeParmType() || t->isRecordType() || t->isDependentType())
             return true;
+        // for floating point (with NaN) !(x<y) need not be equivalent to x>=y
+        if (t->isFloatingType() ||
+            binaryOp->getRHS()->IgnoreImpCasts()->getType()->getUnqualifiedDesugaredType()->isFloatingType())
+            return true;
         if (!binaryOp->isComparisonOp())
             return true;
         report(
diff --git a/compilerplugins/clang/test/simplifybool.cxx b/compilerplugins/clang/test/simplifybool.cxx
index e6b52c33f3b6..2cb2e810c110 100644
--- a/compilerplugins/clang/test/simplifybool.cxx
+++ b/compilerplugins/clang/test/simplifybool.cxx
@@ -15,7 +15,16 @@ void f1(int a, int b)
     }
 };
 
-// Consitently either warn about all or none of the below occurrences of "!!":
+void f2(float a, float b)
+{
+    // no warning expected
+    if (!(a < b))
+    {
+        a = b;
+    }
+};
+
+// Consistently either warn about all or none of the below occurrences of "!!":
 
 enum E1
 {
diff --git a/filter/source/graphicfilter/icgm/class4.cxx b/filter/source/graphicfilter/icgm/class4.cxx
index 46f15e650c01..0185f699014c 100644
--- a/filter/source/graphicfilter/icgm/class4.cxx
+++ b/filter/source/graphicfilter/icgm/class4.cxx
@@ -395,7 +395,7 @@ void CGM::ImplDoClass4()
                         fStartAngle = fEndAngle;
                         fEndAngle = fG;
                     }
-                    if ( ( fInterAngle <= fStartAngle )  && ( fInterAngle < fEndAngle ) )
+                    if ( ! ( fInterAngle > fStartAngle )  && ( fInterAngle < fEndAngle ) )
                     {
                         nSwitch ^=1;
                         aIntermediatePoint = aEndingPoint;
@@ -465,7 +465,7 @@ void CGM::ImplDoClass4()
                         fStartAngle = fEndAngle;
                         fEndAngle = fG;
                     }
-                    if ( ( fInterAngle <= fStartAngle )  && ( fInterAngle < fEndAngle ) )
+                    if ( ! ( fInterAngle > fStartAngle )  && ( fInterAngle < fEndAngle ) )
                     {
                         aIntermediatePoint = aEndingPoint;
                         aEndingPoint = aStartingPoint;
diff --git a/sal/rtl/math.cxx b/sal/rtl/math.cxx
index a9b30a4dc498..96c5843dcfea 100644
--- a/sal/rtl/math.cxx
+++ b/sal/rtl/math.cxx
@@ -170,7 +170,7 @@ bool isRepresentableInteger(double fAbsValue)
         // this here.
         double fInt;
         return (nInt <= kMaxInt &&
-                (((fInt = static_cast< double >(nInt)) >= fAbsValue) && (fInt <= fAbsValue)));
+                (!((fInt = static_cast< double >(nInt)) < fAbsValue) && !(fInt > fAbsValue)));
     }
     return false;
 }
diff --git a/svl/source/numbers/zformat.cxx b/svl/source/numbers/zformat.cxx
index 9a314d40b6aa..d3e48317f4d0 100644
--- a/svl/source/numbers/zformat.cxx
+++ b/svl/source/numbers/zformat.cxx
@@ -2368,7 +2368,7 @@ bool SvNumberformat::GetOutputString(double fNumber,
             {
                 if (::rtl::math::isSignBitSet(fNumber))
                 {
-                    if (fNumber >= 0.0)
+                    if (!(fNumber < 0.0))
                         fNumber = -fNumber;     // do not display -0.0
                 }
                 if (fNumber == 0.0)
diff --git a/tools/source/generic/b3dtrans.cxx b/tools/source/generic/b3dtrans.cxx
index c65074482529..1162f24993f6 100644
--- a/tools/source/generic/b3dtrans.cxx
+++ b/tools/source/generic/b3dtrans.cxx
@@ -59,11 +59,11 @@ void B3dTransformationSet::Orientation(basegfx::B3DHomMatrix& rTarget, const bas
 
 void B3dTransformationSet::Frustum(basegfx::B3DHomMatrix& rTarget, double fLeft, double fRight, double fBottom, double fTop, double fNear, double fFar)
 {
-    if(fNear <= 0.0)
+    if(!(fNear > 0.0))
     {
         fNear = 0.001;
     }
-    if(fFar <= 0.0)
+    if(!(fFar > 0.0))
     {
         fFar = 1.0;
     }