[WebAssembly] Add multivalue and tail-call target features
Summary:
These features will both be implemented soon, so I thought I would
save time by adding the boilerplate for both of them at the same time.
Reviewers: aheejin
Subscribers: dschuff, sbc100, jgravelle-google, hiraditya, sunfish, cfe-commits, llvm-commits
Tags: #clang, #llvm
Differential Revision: https://reviews.llvm.org/D62047
llvm-svn: 361516
diff --git a/llvm/test/CodeGen/WebAssembly/tailcall.ll b/llvm/test/CodeGen/WebAssembly/tailcall.ll
new file mode 100644
index 0000000..809d46a
--- /dev/null
+++ b/llvm/test/CodeGen/WebAssembly/tailcall.ll
@@ -0,0 +1,21 @@
+; RUN: llc < %s -asm-verbose=false -verify-machineinstrs -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -mattr=+tail-call | FileCheck %s
+
+; Test that the tail-call attribute is accepted
+; TODO(tlively): implement tail call
+
+target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
+target triple = "wasm32-unknown-unknown"
+
+; CHECK-LABEL: recursive_tail:
+; CHECK: i32.call $push[[L0:[0-9]+]]=, recursive_tail{{$}}
+; CHECK-NEXT: return $pop[[L0]]{{$}}
+define i32 @recursive_tail() {
+ %v = tail call i32 @recursive_tail()
+ ret i32 %v
+}
+
+; CHECK-LABEL: .section .custom_section.target_features
+; CHECK-NEXT: .int8 1
+; CHECK-NEXT: .int8 43
+; CHECK-NEXT: .int8 9
+; CHECK-NEXT: .ascii "tail-call"