Index: test/wasm/Inputs/start.ll
===================================================================
--- /dev/null
+++ test/wasm/Inputs/start.ll
@@ -0,0 +1,6 @@
+target triple = "wasm32-unknown-unknown-wasm"
+
+define void @_start() local_unnamed_addr {
+entry:
+  ret void
+}
Index: test/wasm/import-memory.test
===================================================================
--- test/wasm/import-memory.test
+++ test/wasm/import-memory.test
@@ -1,5 +1,5 @@
-# RUN: llc -filetype=obj %p/Inputs/ret32.ll -o %t.ret32.o
-# RUN: lld -flavor wasm -entry ret32 --import-memory -o %t.wasm %t.ret32.o
+# RUN: llc -filetype=obj %p/Inputs/start.ll -o %t.start.o
+# RUN: lld -flavor wasm --import-memory -o %t.wasm %t.start.o
 # RUN: obj2yaml %t.wasm | FileCheck %s
 
 # Verify the --import-memory flag creates a memory import
Index: test/wasm/invalid-stack-size.ll
===================================================================
--- test/wasm/invalid-stack-size.ll
+++ /dev/null
@@ -1,11 +0,0 @@
-; RUN: llc -filetype=obj %s -o %t.o
-; RUN: not lld -flavor wasm -o %t.wasm -z stack-size=1 %t.o 2>&1 | FileCheck %s
-
-target triple = "wasm32-unknown-unknown-wasm"
-
-define i32 @_start() local_unnamed_addr #1 {
-entry:
-  ret i32 0
-}
-
-; CHECK: error: stack size must be 16-byte aligned
Index: test/wasm/invalid-stack-size.test
===================================================================
--- /dev/null
+++ test/wasm/invalid-stack-size.test
@@ -0,0 +1,4 @@
+; RUN: llc -filetype=obj %p/Inputs/start.ll -o %t.o
+; RUN: not lld -flavor wasm -o %t.wasm -z stack-size=1 %t.o 2>&1 | FileCheck %s
+
+; CHECK: error: stack size must be 16-byte aligned
Index: test/wasm/load-undefined.test
===================================================================
--- test/wasm/load-undefined.test
+++ test/wasm/load-undefined.test
@@ -3,18 +3,11 @@
 ;
 ; RUN: llc -filetype=obj %S/Inputs/ret64.ll -o %t.o
 ; RUN: llc -filetype=obj %S/Inputs/ret32.ll -o %t2.o
-; RUN: llc -filetype=obj %s -o %t3.o
+; RUN: llc -filetype=obj %S/Inputs/start.ll -o %t.start.o
 ; RUN: llvm-ar rcs %t2.a %t2.o
-; RUN: lld -flavor wasm %t3.o %t2.a %t.o -o %t.wasm -u ret32 --undefined ret64
+; RUN: lld -flavor wasm %t.start.o %t2.a %t.o -o %t.wasm -u ret32 --undefined ret64
 ; RUN: obj2yaml %t.wasm | FileCheck %s
 
-target triple = "wasm32-unknown-unknown-wasm"
-
-define i32 @_start() local_unnamed_addr {
-entry:
-  ret i32 1
-}
-
 ; CHECK:        - Type:            EXPORT
 ; CHECK-NEXT:     Exports:
 ; CHECK-NEXT:       - Name:            memory
@@ -36,8 +29,8 @@
 
 
 ; Verify that referencing a symbol that doesn't exist won't work
-; RUN: not lld -flavor wasm %t3.o -o %t.wasm -u symboldoesnotexist 2>&1 | FileCheck -check-prefix=CHECK-UNDEFINED1 %s
+; RUN: not lld -flavor wasm %t.start.o -o %t.wasm -u symboldoesnotexist 2>&1 | FileCheck -check-prefix=CHECK-UNDEFINED1 %s
 ; CHECK-UNDEFINED1: error: undefined symbol: symboldoesnotexist
 
-; RUN: not lld -flavor wasm %t3.o -o %t.wasm --undefined symboldoesnotexist --allow-undefined 2>&1 | FileCheck -check-prefix=CHECK-UNDEFINED2 %s
+; RUN: not lld -flavor wasm %t.start.o -o %t.wasm --undefined symboldoesnotexist --allow-undefined 2>&1 | FileCheck -check-prefix=CHECK-UNDEFINED2 %s
 ; CHECK-UNDEFINED2: function forced with --undefined not found: symboldoesnotexist
Index: test/wasm/strip-debug.test
===================================================================
--- test/wasm/strip-debug.test
+++ test/wasm/strip-debug.test
@@ -1,5 +1,5 @@
-RUN: llc -filetype=obj %p/Inputs/ret32.ll -o %t.ret32.o
-RUN: lld -flavor wasm --strip-debug --entry=ret32 -o %t.wasm %t.ret32.o
+RUN: llc -filetype=obj %p/Inputs/start.ll -o %t.start.o
+RUN: lld -flavor wasm --strip-debug -o %t.wasm %t.start.o
 RUN: obj2yaml %t.wasm | FileCheck %s
 
 # Check that there is no name section