[X86] Remove old UNIMPLEMENTED list

All of these are implemented and have appropriate test coverage

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@326553 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/README-UNIMPLEMENTED.txt b/lib/Target/X86/README-UNIMPLEMENTED.txt
deleted file mode 100644 (file)
index c26c75a..0000000
--- a/lib/Target/X86/README-UNIMPLEMENTED.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-//===---------------------------------------------------------------------===//
-// Testcases that crash the X86 backend because they aren't implemented
-//===---------------------------------------------------------------------===//
-
-These are cases we know the X86 backend doesn't handle.  Patches are welcome
-and appreciated, because no one has signed up to implemented these yet.
-Implementing these would allow elimination of the corresponding intrinsics,
-which would be great.
-
-1) vector shifts
-2) vector comparisons
-3) vector fp<->int conversions: PR2683, PR2684, PR2685, PR2686, PR2688
-4) bitcasts from vectors to scalars: PR2804
-5) llvm.atomic.cmp.swap.i128.p0i128: PR3462