1 files changed, 26 insertions, 0 deletions
diff --git a/test/CodeGen/WebAssembly/unsupported-function-bitcasts.ll b/test/CodeGen/WebAssembly/unsupported-function-bitcasts.ll
new file mode 100644
index 0000000000000..ef4318ec299b7
--- /dev/null
+++ b/test/CodeGen/WebAssembly/unsupported-function-bitcasts.ll
@@ -0,0 +1,26 @@
+; RUN: llc < %s -asm-verbose=false | FileCheck %s
+
+; Test that function pointer casts that require conversions are not converted
+; to wrappers. In theory some conversions could be supported, but currently no
+; conversions are implemented.
+
+target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
+target triple = "wasm32-unknown-unknown"
+
+; CHECK-LABEL: test:
+; CHECK-NEXT: i32.const   $push[[L0:[0-9]+]]=, 0{{$}}
+; CHECK-NEXT: call        has_i64_arg@FUNCTION, $pop[[L0]]{{$}}
+; CHECK-NEXT: i32.call    $drop=, has_i64_ret@FUNCTION{{$}}
+; CHECK-NEXT: .endfunc
+
+; CHECK-NOT: .Lbitcast
+
+declare void @has_i64_arg(i64)
+declare i64 @has_i64_ret()
+
+define void @test() {
+entry:
+  call void bitcast (void (i64)* @has_i64_arg to void (i32)*)(i32 0)
+  %t = call i32 bitcast (i64 ()* @has_i64_ret to i32 ()*)()
+  ret void
+}