1; RUN: opt < %s -deadargelim -die -S > %t 2; RUN: cat %t | not grep DEAD 3; RUN: cat %t | grep LIVE | count 4 4 5@P = external global i32 ; <i32*> [#uses=1] 6 7; Dead arg only used by dead retval 8define internal i32 @test(i32 %DEADARG) { 9 ret i32 %DEADARG 10} 11 12define internal i32 @test2(i32 %DEADARG) { 13 %DEADRETVAL = call i32 @test( i32 %DEADARG ) ; <i32> [#uses=1] 14 ret i32 %DEADRETVAL 15} 16 17define void @test3(i32 %X) { 18 %DEADRETVAL = call i32 @test2( i32 %X ) ; <i32> [#uses=0] 19 ret void 20} 21 22define internal i32 @foo() { 23 %DEAD = load i32, i32* @P ; <i32> [#uses=1] 24 ret i32 %DEAD 25} 26 27define internal i32 @id(i32 %X) { 28 ret i32 %X 29} 30 31define void @test4() { 32 %DEAD = call i32 @foo( ) ; <i32> [#uses=1] 33 %DEAD2 = call i32 @id( i32 %DEAD ) ; <i32> [#uses=0] 34 ret void 35} 36 37; These test if returning another functions return value properly marks that 38; other function's return value as live. We do this twice, with the functions in 39; different orders (ie, first the caller, than the callee and first the callee 40; and then the caller) since DAE processes functions one by one and handles 41; these cases slightly different. 42 43define internal i32 @test5() { 44 ret i32 123 45} 46 47define i32 @test6() { 48 %LIVE = call i32 @test5() 49 ret i32 %LIVE 50} 51 52define i32 @test7() { 53 %LIVE = call i32 @test8() 54 ret i32 %LIVE 55} 56 57define internal i32 @test8() { 58 ret i32 124 59} 60