[XRay] ARM 32-bit no-Thumb support in LLVM

This is a port of XRay to ARM 32-bit, without Thumb support yet. The XRay instrumentation support is moving up to AsmPrinter.
This is one of 3 commits to different repositories of XRay ARM port. The other 2 are:

https://reviews.llvm.org/D23932 (Clang test)
https://reviews.llvm.org/D23933 (compiler-rt)

Differential Revision: https://reviews.llvm.org/D23931

llvm-svn: 281878

1 files changed, 12 insertions, 0 deletions

diff --git a/llvm/lib/Target/ARM/ARMAsmPrinter.h b/llvm/lib/Target/ARM/ARMAsmPrinter.h
index 30abdbc322a..0db0a0f5f92 100644
--- a/llvm/lib/Target/ARM/ARMAsmPrinter.h
+++ b/llvm/lib/Target/ARM/ARMAsmPrinter.h
@@ -101,7 +101,19 @@ public:
   // lowerOperand - Convert a MachineOperand into the equivalent MCOperand.
   bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp);
 
+  //===------------------------------------------------------------------===//
+  // XRay implementation
+  //===------------------------------------------------------------------===//
+public:
+  // XRay-specific lowering for ARM.
+  void LowerPATCHABLE_FUNCTION_ENTER(const MachineInstr &MI);
+  void LowerPATCHABLE_FUNCTION_EXIT(const MachineInstr &MI);
+  // Helper function that emits the XRay sleds we've collected for a particular
+  // function.
+  void EmitXRayTable();
+
 private:
+  void EmitSled(const MachineInstr &MI, SledKind Kind);
 
   // Helpers for EmitStartOfAsmFile() and EmitEndOfAsmFile()
   void emitAttributes();