[llvm] r178657 - Remove some obsolete PowerPC/README entries

[Hal Finkel]

Author: hfinkel
Date: Wed Apr  3 09:25:55 2013
New Revision: 178657

URL: http://llvm.org/viewvc/llvm-project?rev=178657&view=rev
Log:
Remove some obsolete PowerPC/README entries

Modified:
    llvm/trunk/lib/Target/PowerPC/README.txt

Modified: llvm/trunk/lib/Target/PowerPC/README.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/PowerPC/README.txt?rev=178657&r1=178656&r2=178657&view=diff
==============================================================================
--- llvm/trunk/lib/Target/PowerPC/README.txt (original)
+++ llvm/trunk/lib/Target/PowerPC/README.txt Wed Apr  3 09:25:55 2013
@@ -203,12 +203,6 @@ http://gcc.gnu.org/ml/gcc-patches/2006-0
 
 ===-------------------------------------------------------------------------===
 
-Implement Newton-Rhapson method for improving estimate instructions to the
-correct accuracy, and implementing divide as multiply by reciprocal when it has
-more than one use.  Itanium would want this too.
-
-===-------------------------------------------------------------------------===
-
 Compile offsets from allocas:
 
 int *%test() {
@@ -535,20 +529,6 @@ void func(unsigned int *ret, float dx, f
 
 ===-------------------------------------------------------------------------===
 
-Complete the signed i32 to FP conversion code using 64-bit registers
-transformation, good for PI.  See PPCISelLowering.cpp, this comment:
-
-     // FIXME: disable this lowered code.  This generates 64-bit register values,
-     // and we don't model the fact that the top part is clobbered by calls.  We
-     // need to flag these together so that the value isn't live across a call.
-     //setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
-
-Also, if the registers are spilled to the stack, we have to ensure that all
-64-bits of them are save/restored, otherwise we will miscompile the code.  It
-sounds like we need to get the 64-bit register classes going.
-
-===-------------------------------------------------------------------------===
-
 %struct.B = type { i8, [3 x i8] }
 
 define void @bar(%struct.B* %b) {