[WebAssembly] Fix assembly printing of br_table

Summary: In `br_table's stack version asm string, \t was missing.

Reviewers: aardappel

Subscribers: dschuff, sbc100, jgravelle-google, sunfish, llvm-commits

Differential Revision: https://reviews.llvm.org/D53516

llvm-svn: 344981

1 files changed, 32 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/WebAssembly/stack-insts.ll b/llvm/test/CodeGen/WebAssembly/stack-insts.ll
new file mode 100644
index 00000000000..0876b4a4279
--- /dev/null
+++ b/llvm/test/CodeGen/WebAssembly/stack-insts.ll
@@ -0,0 +1,32 @@
+; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -disable-block-placement -verify-machineinstrs | FileCheck %s
+
+target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
+target triple = "wasm32-unknown-unknown"
+
+declare void @foo0()
+declare void @foo1()
+
+; Tests if br_table is printed correctly with a tab.
+; CHECK-LABEL: test0:
+; CHECK-NOT: br_table0, 1, 0, 1, 0
+; CHECK: br_table 0, 1, 0, 1, 0
+define void @test0(i32 %n) {
+entry:
+  switch i32 %n, label %sw.epilog [
+    i32 0, label %sw.bb
+    i32 1, label %sw.bb.1
+    i32 2, label %sw.bb
+    i32 3, label %sw.bb.1
+  ]
+
+sw.bb:                                            ; preds = %entry, %entry
+  tail call void @foo0()
+  br label %sw.epilog
+
+sw.bb.1:                                          ; preds = %entry, %entry
+  tail call void @foo1()
+  br label %sw.epilog
+
+sw.epilog:                                        ; preds = %entry, %sw.bb, %sw.bb.1
+  ret void
+}