[WebAssembly] Use a physical register to describe ARGUMENT liveness.

[oota-llvm.git] / lib / Target / WebAssembly / WebAssemblyRegisterInfo.td

diff --git a/lib/Target/WebAssembly/WebAssemblyRegisterInfo.td b/lib/Target/WebAssembly/WebAssemblyRegisterInfo.td
index 2cf1e38b25b9c11237740c5c0fc65098e8029ec7..4057ff7a9b4348641eea75cfbd57592e71587024 100644 (file)
--- a/lib/Target/WebAssembly/WebAssemblyRegisterInfo.td
+++ b/lib/Target/WebAssembly/WebAssemblyRegisterInfo.td
@@ -43,6 +43,11 @@ def F64_0 : WebAssemblyReg<"%f64.0">;
 // order uses and defs that must remain in FIFO order.
 def EXPR_STACK : WebAssemblyReg<"STACK">;
 
+// The incoming arguments "register". This is an opaque entity which serves to
+// order the ARGUMENT instructions that are emulating live-in registers and
+// must not be scheduled below other instructions.
+def ARGUMENTS : WebAssemblyReg<"ARGUMENTS">;
+
 //===----------------------------------------------------------------------===//
 //  Register classes
 //===----------------------------------------------------------------------===//