AMDGPU: Create emergency stack slots during frame lowering

Test has a bogus verifier error which will be fixed by later commits.

llvm-svn: 252327

1 files changed, 31 insertions, 0 deletions

diff --git a/llvm/lib/Target/AMDGPU/SIFrameLowering.h b/llvm/lib/Target/AMDGPU/SIFrameLowering.h
new file mode 100644
index 00000000000..677128d6ce0
--- /dev/null
+++ b/llvm/lib/Target/AMDGPU/SIFrameLowering.h
@@ -0,0 +1,31 @@
+//===--------------------- SIFrameLowering.h --------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_AMDGPU_SIFRAMELOWERING_H
+#define LLVM_LIB_TARGET_AMDGPU_SIFRAMELOWERING_H
+
+#include "AMDGPUFrameLowering.h"
+
+namespace llvm {
+
+class SIFrameLowering final : public AMDGPUFrameLowering {
+public:
+  SIFrameLowering(StackDirection D, unsigned StackAl, int LAO,
+                  unsigned TransAl = 1) :
+    AMDGPUFrameLowering(D, StackAl, LAO, TransAl) {}
+  ~SIFrameLowering() override {}
+
+  void processFunctionBeforeFrameFinalized(
+    MachineFunction &MF,
+    RegScavenger *RS = nullptr) const override;
+};
+
+}
+
+#endif