1 ; This test sees if return values (and arguments) are properly removed when they
2 ; are unused. All unused values are typed i16, so we can easily check. We also
3 ; run instcombine to fold insert/extractvalue chains and we run dce to clean up
4 ; any remaining dead stuff.
5 ; RUN: llvm-as < %s | opt -deadargelim -instcombine -dce | llvm-dis | not grep i16
7 define internal {i16, i32} @test(i16 %DEADARG) {
8 %A = insertvalue {i16,i32} undef, i16 1, 0
9 %B = insertvalue {i16,i32} %A, i32 1001, 1
13 define internal {i32, i16} @test2() {
14 %DEAD = call i16 @test4()
15 %A = insertvalue {i32,i16} undef, i32 1, 0
16 %B = insertvalue {i32,i16} %A, i16 %DEAD, 1
20 define internal i32 @test3(i16 %A) {
21 %ret = call {i16, i32} @test( i16 %A ) ; <i32> [#uses=0]
22 %DEAD = extractvalue {i16, i32} %ret, 0
23 %LIVE = extractvalue {i16, i32} %ret, 1
27 define internal i16 @test4() {
32 %ret = call {i32, i16} @test2() ; <i32> [#uses=1]
33 %LIVE = extractvalue {i32, i16} %ret, 0
34 %DEAD = extractvalue {i32, i16} %ret, 1
35 %Y = add i32 %LIVE, -123 ; <i32> [#uses=1]
36 %LIVE2 = call i32 @test3(i16 %DEAD) ; <i32> [#uses=1]
37 %Z = add i32 %LIVE2, %Y ; <i32> [#uses=1]