; RUN: opt < %s -deadargelim -die -S > %t ; RUN: cat %t | not grep DEAD ; RUN: cat %t | grep LIVE | count 4 @P = external global i32 ; <i32*> [#uses=1] ; Dead arg only used by dead retval define internal i32 @test(i32 %DEADARG) { ret i32 %DEADARG } define internal i32 @test2(i32 %DEADARG) { %DEADRETVAL = call i32 @test( i32 %DEADARG ) ; <i32> [#uses=1] ret i32 %DEADRETVAL } define void @test3(i32 %X) { %DEADRETVAL = call i32 @test2( i32 %X ) ; <i32> [#uses=0] ret void } define internal i32 @foo() { %DEAD = load i32* @P ; <i32> [#uses=1] ret i32 %DEAD } define internal i32 @id(i32 %X) { ret i32 %X } define void @test4() { %DEAD = call i32 @foo( ) ; <i32> [#uses=1] %DEAD2 = call i32 @id( i32 %DEAD ) ; <i32> [#uses=0] ret void } ; These test if returning another functions return value properly marks that ; other function's return value as live. We do this twice, with the functions in ; different orders (ie, first the caller, than the callee and first the callee ; and then the caller) since DAE processes functions one by one and handles ; these cases slightly different. define internal i32 @test5() { ret i32 123 } define i32 @test6() { %LIVE = call i32 @test5() ret i32 %LIVE } define i32 @test7() { %LIVE = call i32 @test8() ret i32 %LIVE } define internal i32 @test8() { ret i32 124 }