commit 23a98551ab65eeb8fe5019df8b7db4891582a4bd
author Dale Johannesen <dalej@apple.com> Thu Oct 09 23:00:39 2008 +0000
committer Dale Johannesen <dalej@apple.com> Thu Oct 09 23:00:39 2008 +0000
tree 90d6731fd446c04df49383b8a23da0461337ba09
parent 7111b02c734c992b8c97d9918118768026dad79e

Add a "loses information" return value to APFloat::convert
and APFloat::convertToInteger.  Restore return value to
IEEE754.  Adjust all users accordingly.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57329 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/CBackend/CBackend.cpp

diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp
index 96ae40c..9a79748 100644
--- a/lib/Target/CBackend/CBackend.cpp
+++ b/lib/Target/CBackend/CBackend.cpp
@@ -832,12 +832,13 @@
 // only deal in IEEE FP).
 //
 static bool isFPCSafeToPrint(const ConstantFP *CFP) {
+  bool ignored;
   // Do long doubles in hex for now.
   if (CFP->getType()!=Type::FloatTy && CFP->getType()!=Type::DoubleTy)
     return false;
   APFloat APF = APFloat(CFP->getValueAPF());  // copy
   if (CFP->getType()==Type::FloatTy)
-    APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven);
+    APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &ignored);
 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
   char Buffer[100];
   sprintf(Buffer, "%a", APF.convertToDouble());

lib/Target/CppBackend/CPPBackend.cpp

diff --git a/lib/Target/CppBackend/CPPBackend.cpp b/lib/Target/CppBackend/CPPBackend.cpp
index 21e6735..fb83663 100644
--- a/lib/Target/CppBackend/CPPBackend.cpp
+++ b/lib/Target/CppBackend/CPPBackend.cpp
@@ -218,9 +218,10 @@
   // This makes sure that conversion to/from floating yields the same binary
   // result so that we don't lose precision.
   void CppWriter::printCFP(const ConstantFP *CFP) {
+    bool ignored;
     APFloat APF = APFloat(CFP->getValueAPF());  // copy
     if (CFP->getType() == Type::FloatTy)
-      APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven);
+      APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &ignored);
     Out << "ConstantFP::get(";
     Out << "APFloat(";
 #if HAVE_PRINTF_A

lib/Target/X86/X86ISelLowering.cpp

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index d74588e..d5b2b44 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -482,13 +482,16 @@
   setOperationAction(ISD::UNDEF,     MVT::f80, Expand);
   setOperationAction(ISD::FCOPYSIGN, MVT::f80, Expand);
   {
+    bool ignored;
     APFloat TmpFlt(+0.0);
-    TmpFlt.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven);
+    TmpFlt.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven,
+                   &ignored);
     addLegalFPImmediate(TmpFlt);  // FLD0
     TmpFlt.changeSign();
     addLegalFPImmediate(TmpFlt);  // FLD0/FCHS
     APFloat TmpFlt2(+1.0);
-    TmpFlt2.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven);
+    TmpFlt2.convert(APFloat::x87DoubleExtended, APFloat::rmNearestTiesToEven,
+                    &ignored);
     addLegalFPImmediate(TmpFlt2);  // FLD1
     TmpFlt2.changeSign();
     addLegalFPImmediate(TmpFlt2);  // FLD1/FCHS