Revert "Seperate frontend changes, add debug directives, remove redundant stuff from tests"

This reverts commit 1a908c6.

Author: kiran-isaac

clang/lib/CodeGen/CGCall.cpp

@@ -5086,7 +5086,7 @@ RValue CodeGenFunction::EmitCall(const CGFunctionInfo &CallInfo,
   RawAddress SRetAlloca = RawAddress::invalid();
   llvm::Value *UnusedReturnSizePtr = nullptr;
   if (RetAI.isIndirect() || RetAI.isInAlloca() || RetAI.isCoerceAndExpand()) {
-    if (IsVirtualFunctionPointerThunk && RetAI.isIndirect()) {
+    if ((IsVirtualFunctionPointerThunk || IsMustTail) && RetAI.isIndirect()) {
       SRetPtr = makeNaturalAddressForPointer(CurFn->arg_begin() +
                                                  IRFunctionArgs.getSRetArgNo(),
                                              RetTy, CharUnits::fromQuantity(1));

llvm/include/llvm/CodeGen/CallingConvLower.h

@@ -540,9 +540,7 @@ class CCState {
                });
   }
 
-#ifndef NDEBUG
   void dump() const;
-#endif
 
 private:
   /// MarkAllocated - Mark a register and all of its aliases as allocated.

llvm/lib/CodeGen/CallingConvLower.cpp

@@ -291,7 +291,6 @@ bool CCState::resultsCompatible(CallingConv::ID CalleeCC,
                     RVLocs2.end(), AreCompatible);
 }
 
-#ifndef NDEBUG
 void CCState::dump() const {
   dbgs() << "CCState:\n";
   for (const CCValAssign &Loc : Locs) {
@@ -352,4 +351,3 @@ void CCState::dump() const {
     dbgs() << "\n";
   }
 }
-#endif

llvm/test/CodeGen/ARM/tail-call-float.ll

@@ -1,8 +1,8 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
 ; RUN: llc -mtriple armv7 -target-abi aapcs -float-abi soft -O0 -o - < %s \
-; RUN:   | FileCheck %s -check-prefix CHECK-SOFT
+; RUN:   | FileCheck %s -check-prefix CHECK-SOFT -check-prefix CHECK
 ; RUN: llc -mtriple armv7 -target-abi aapcs -float-abi hard -O0 -o - < %s \
-; RUN:   | FileCheck %s -check-prefix CHECK-HARD
+; RUN:   | FileCheck %s -check-prefix CHECK-HARD -check-prefix CHECK
 
 ; Tests for passing floating-point regs. Variadic functions will always use
 ; general-purpose registers. Standard functions will use the floating-point