Remove a few tests which no longer hold for deadargelim (since it is now

allowed to canonicalize return values).

Add a test that checks if return value and function attributes are not removed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53612 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/DeadArgElim/keepalive.ll

@@ -1,21 +1,14 @@
 ; RUN: llvm-as < %s | opt -deadargelim | llvm-dis > %t
-; RUN: cat %t | grep {define internal \{  \} @test}
-; RUN: cat %t | grep {define internal \{ i32 \} @test}
+; RUN: cat %t | grep {define internal i32 @test1() zeroext nounwind}
 ; RUN: cat %t | grep {define internal \<\{ i32, i32 \}\> @test}
 
 ; Check if the pass doesn't modify anything that doesn't need changing. We feed
 ; an unused argument to each function to lure it into changing _something_ about
 ; the function and then changing too much.
 
-
-; This checks if the struct retval isn't changed into a void
-define internal {  } @test(i32 %DEADARG1) {
-        ret {  } {  } 
-}
-
-; This checks if the struct retval isn't removed
-define internal {i32} @test1(i32 %DEADARG1) {
-        ret { i32 } { i32 1 } 
+; This checks if the return value attributes are not removed
+define internal i32 @test1(i32 %DEADARG1) nounwind zeroext{
+        ret i32 1
 }
 
 ; This checks if the struct doesn't get non-packed
@@ -24,13 +17,12 @@ define internal <{ i32, i32 }> @test2(i32 %DEADARG1) {
 }
 
 ; We use this external function to make sure the return values don't become dead
-declare void @user({  }, { i32 }, <{ i32, i32 }>)
+declare void @user(i32, <{ i32, i32 }>)
 
 define void @caller() {
-        %A = call {  } @test(i32 0)
-        %B = call { i32 } @test1(i32 1)
+        %B = call i32 @test1(i32 1)
         %C = call <{ i32, i32 }> @test2(i32 2)
-        call void @user({  } %A, { i32 } %B, <{ i32, i32 }> %C)
+        call void @user(i32 %B, <{ i32, i32 }> %C)
         ret void
 }