Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/lld/test/wasm/undefined.ll

@@ -0,0 +1,20 @@
+; RUN: llc -filetype=obj -mtriple=wasm32-unknown-unknown-wasm %s -o %t.o
+; RUN: lld -flavor wasm --allow-undefined -o %t.wasm %t.o
+
+; Fails due to undefined 'foo'
+; RUN: not lld -flavor wasm -o %t.wasm %t.o 2>&1 | FileCheck %s
+; CHECK: error: {{.*}}.o: undefined symbol: foo
+
+; But succeeds if we pass a file containing 'foo' as --allow-undefined-file.
+; RUN: echo 'foo' > %t.txt
+; RUN: lld -flavor wasm --allow-undefined-file=%t.txt -o %t.wasm %t.o
+
+; Takes the address of the external foo() resulting in undefined external
+@bar = hidden local_unnamed_addr global i8* bitcast (i32 ()* @foo to i8*), align 4
+
+declare i32 @foo() #0
+
+define hidden void @_start() local_unnamed_addr #0 {
+entry:
+    ret void
+}