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 8 define internal i32 @test(i32 %DEADARG) { 9 ret i32 %DEADARG 10 } 11 12 define internal i32 @test2(i32 %DEADARG) { 13 %DEADRETVAL = call i32 @test( i32 %DEADARG ) ; <i32> [#uses=1] 14 ret i32 %DEADRETVAL 15 } 16 17 define void @test3(i32 %X) { 18 %DEADRETVAL = call i32 @test2( i32 %X ) ; <i32> [#uses=0] 19 ret void 20 } 21 22 define internal i32 @foo() { 23 %DEAD = load i32* @P ; <i32> [#uses=1] 24 ret i32 %DEAD 25 } 26 27 define internal i32 @id(i32 %X) { 28 ret i32 %X 29 } 30 31 define 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 43 define internal i32 @test5() { 44 ret i32 123 45 } 46 47 define i32 @test6() { 48 %LIVE = call i32 @test5() 49 ret i32 %LIVE 50 } 51 52 define i32 @test7() { 53 %LIVE = call i32 @test8() 54 ret i32 %LIVE 55 } 56 57 define internal i32 @test8() { 58 ret i32 124 59 } 60
