Revert r182937 and r182877.

r182877 broke MCJIT tests on ARM and r182937 was working around another failure
by r182877.

This should make the ARM bots green.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182960 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 17 deletions

diff --git a/lib/Target/ARM/ARMFastISel.cpp b/lib/Target/ARM/ARMFastISel.cpp
index a64768845e..1c3fa84385 100644
--- a/lib/Target/ARM/ARMFastISel.cpp
+++ b/lib/Target/ARM/ARMFastISel.cpp
@@ -628,11 +628,6 @@ unsigned ARMFastISel::ARMMaterializeGV(const GlobalValue *GV, MVT VT) {
     (const TargetRegisterClass*)&ARM::GPRRegClass;
   unsigned DestReg = createResultReg(RC);
 
-  // FastISel TLS support on non-Darwin is broken, punt to SelectionDAG.
-  const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV);
-  bool IsThreadLocal = GVar && GVar->isThreadLocal();
-  if (!Subtarget->isTargetDarwin() && IsThreadLocal) return 0;
-
   // Use movw+movt when possible, it avoids constant pool entries.
   // Darwin targets don't support movt with Reloc::Static, see
   // ARMTargetLowering::LowerGlobalAddressDarwin.  Other targets only support
@@ -2966,22 +2961,13 @@ bool ARMFastISel::FastLowerArguments() {
 namespace llvm {
   FastISel *ARM::createFastISel(FunctionLoweringInfo &funcInfo,
                                 const TargetLibraryInfo *libInfo) {
+    // Completely untested on non-iOS.
     const TargetMachine &TM = funcInfo.MF->getTarget();
 
+    // Darwin and thumb1 only for now.
     const ARMSubtarget *Subtarget = &TM.getSubtarget<ARMSubtarget>();
-    // Thumb2 support on iOS; ARM support on iOS, Linux and NaCl.
-    bool UseFastISel = false;
-    UseFastISel |= Subtarget->isTargetIOS() && !Subtarget->isThumb1Only();
-    UseFastISel |= Subtarget->isTargetLinux() && !Subtarget->isThumb();
-    UseFastISel |= Subtarget->isTargetNaCl() && !Subtarget->isThumb();
-    if (UseFastISel) {
-      // iOS always has a FP for backtracking, force other targets
-      // to keep their FP when doing FastISel. The emitted code is
-      // currently superior, and in cases like test-suite's lencod
-      // FastISel isn't quite correct when FP is eliminated.
-      TM.Options.NoFramePointerElim = true;
+    if (Subtarget->isTargetIOS() && !Subtarget->isThumb1Only())
       return new ARMFastISel(funcInfo, libInfo);
-    }
     return 0;
   }
 }