[clang] [compiler-rt] [llvm] [XRay][RISCV] RISCV support for XRay (PR #117368)

[Craig Topper via cfe-commits]

================
@@ -0,0 +1,83 @@
+//===-- xray_trampoline_riscv64.s ----------------------------------*- ASM -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of XRay, a dynamic runtime instrumentation system.
+//
+// This implements the riscv64-specific assembler for the trampolines.
+//
+//===----------------------------------------------------------------------===//
+
+.macro SAVE_ARG_REGISTERS
+	// Push return registers to stack
+	addi	sp, sp, -136
----------------
topperc wrote:

The stack pointer must always be 16 byte aligned.

https://github.com/llvm/llvm-project/pull/117368