1; RUN: opt < %s -passes='deadargelim,function(dce)' -S > %t 2; RUN: cat %t | grep 123 3 4; This test tries to catch wrongful removal of return values for a specific case 5; that was breaking llvm-gcc builds. 6 7; This function has a live return value, it is used by @alive. 8define internal i32 @test5() { 9 ret i32 123 10} 11 12; This function doesn't use the return value @test5 and tries to lure DAE into 13; marking @test5's return value dead because only this call is unused. 14define i32 @dead() { 15 %DEAD = call i32 @test5() 16 ret i32 0 17} 18 19; This function ensures the retval of @test5 is live. 20define i32 @alive() { 21 %LIVE = call i32 @test5() 22 ret i32 %LIVE 23} 24