Index: test/CodeGen/WebAssembly/inline-asm-roundtrip.ll
===================================================================
--- /dev/null
+++ test/CodeGen/WebAssembly/inline-asm-roundtrip.ll
@@ -0,0 +1,43 @@
+; RUN: llc < %s | llvm-mc -triple=wasm32-unknown-unknown | FileCheck --match-full-lines %s
+
+; Test basic inline assembly can actually be assembled by the assembler.
+
+; .ll code below is the result of this code run thru
+; clang -target wasm32-unknown-unknown-wasm -O2 -S -emit-llvm test.c
+
+; int main(int argc, const char *argv[]) {
+;   int src = 1;
+;   int dst;
+;   asm ("i32.const\t2\n"
+;        "\tget_local\t%1\n"
+;        "\ti32.add\n"
+;        "\tset_local\t%0"
+;        : "=r" (dst)
+;        : "r" (src));
+;   return dst != 3;
+; }
+
+target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
+target triple = "wasm32-unknown-unknown"
+
+; CHECK-LABEL: main:
+; CHECK-NEXT:	.param  	i32, i32
+; CHECK-NEXT:	.local  	i32
+; CHECK-NEXT:	i32.const	1
+; CHECK-NEXT:	set_local	[[SRC:[0-9]+]]
+; CHECK-NEXT:	i32.const	2
+; CHECK-NEXT:	get_local	[[SRC]]
+; CHECK-NEXT:	i32.add
+; CHECK-NEXT:	set_local	[[DST:[0-9]+]]
+; CHECK-NEXT:	get_local	[[DST]]
+; CHECK-NEXT:	i32.const	3
+; CHECK-NEXT:	i32.ne
+
+define i32 @main(i32 %argc, i8** nocapture readnone %argv) #0 {
+entry:
+  %0 = tail call i32 asm "i32.const\092\0A\09get_local\09$1\0A\09i32.add\0A\09set_local\09$0", "=r,r"(i32 1) #1
+  %cmp = icmp ne i32 %0, 3
+  %conv = zext i1 %cmp to i32
+  ret i32 %conv
+}
+