[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:

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

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

llvm-svn: 280888

1 files changed, 9 insertions, 0 deletions

diff --git a/llvm/lib/Target/ARM/ARMAsmPrinter.cpp b/llvm/lib/Target/ARM/ARMAsmPrinter.cpp
index d19a2b9466f..2d8e7256207 100644
--- a/llvm/lib/Target/ARM/ARMAsmPrinter.cpp
+++ b/llvm/lib/Target/ARM/ARMAsmPrinter.cpp
@@ -150,6 +150,9 @@ bool ARMAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
   // Emit the rest of the function body.
   EmitFunctionBody();
 
+  // Emit the XRay table for this function.
+  EmitXRayTable();
+
   // If we need V4T thumb mode Register Indirect Jump pads, emit them.
   // These are created per function, rather than per TU, since it's
   // relatively easy to exceed the thumb branch range within a TU.
@@ -2005,6 +2008,12 @@ void ARMAsmPrinter::EmitInstruction(const MachineInstr *MI) {
                                      .addReg(0));
     return;
   }
+  case ARM::PATCHABLE_FUNCTION_ENTER:
+    LowerPATCHABLE_FUNCTION_ENTER(*MI);
+    return;
+  case ARM::PATCHABLE_FUNCTION_EXIT:
+    LowerPATCHABLE_FUNCTION_EXIT(*MI);
+    return;
   }
 
   MCInst TmpInst;