; are unused. All unused values are typed i16, so we can easily check. We also
; run instcombine to fold insert/extractvalue chains and we run dce to clean up
; any remaining dead stuff.
-; RUN: llvm-as < %s | opt -deadargelim -instcombine -dce | llvm-dis | not grep i16
+; RUN: opt < %s -deadargelim -instcombine -dce -S | not grep i16
define internal {i16, i32} @test(i16 %DEADARG) {
%A = insertvalue {i16,i32} undef, i16 1, 0
ret {i32,i16} %B
}
+; Dead argument, used to check if the second result of test2 is dead even when
+; it's used as a dead argument
define internal i32 @test3(i16 %A) {
%ret = call {i16, i32} @test( i16 %A ) ; <i32> [#uses=0]
%DEAD = extractvalue {i16, i32} %ret, 0
ret i16 0
}
+; Multiple return values, multiple live return values
+define internal {i32, i32, i16} @test5() {
+ %A = insertvalue {i32,i32,i16} undef, i32 1, 0
+ %B = insertvalue {i32,i32,i16} %A, i32 2, 1
+ %C = insertvalue {i32,i32,i16} %B, i16 3, 2
+ ret {i32, i32, i16} %C
+}
+
+; Nested return values
+define internal {{i32}, {i16, i16}} @test6() {
+ %A = insertvalue {{i32}, {i16, i16}} undef, i32 1, 0, 0
+ %B = insertvalue {{i32}, {i16, i16}} %A, i16 2, 1, 0
+ %C = insertvalue {{i32}, {i16, i16}} %B, i16 3, 1, 1
+ ret {{i32}, {i16, i16}} %C
+}
+
define i32 @main() {
%ret = call {i32, i16} @test2() ; <i32> [#uses=1]
%LIVE = extractvalue {i32, i16} %ret, 0
%Y = add i32 %LIVE, -123 ; <i32> [#uses=1]
%LIVE2 = call i32 @test3(i16 %DEAD) ; <i32> [#uses=1]
%Z = add i32 %LIVE2, %Y ; <i32> [#uses=1]
- ret i32 %Z
+ %ret1 = call { i32, i32, i16 } @test5 ()
+ %LIVE3 = extractvalue { i32, i32, i16} %ret1, 0
+ %LIVE4 = extractvalue { i32, i32, i16} %ret1, 1
+ %DEAD2 = extractvalue { i32, i32, i16} %ret1, 2
+ %V = add i32 %LIVE3, %LIVE4
+ %W = add i32 %Z, %V
+ %ret2 = call { { i32 }, { i16, i16 } } @test6 ()
+ %LIVE5 = extractvalue { { i32 }, { i16, i16 } } %ret2, 0, 0
+ %DEAD3 = extractvalue { { i32 }, { i16, i16 } } %ret2, 1, 0
+ %DEAD4 = extractvalue { { i32 }, { i16, i16 } } %ret2, 1, 1
+ %Q = add i32 %W, %LIVE5
+ ret i32 %Q
}