llvm-mirror/test/CodeGen/X86/x86-64-ret0.ll

; RUN: llc < %s -march=x86-64 | grep mov | count 1

define i32 @f() nounwind  {
	tail call void @t( i32 1 ) nounwind 
	ret i32 0
}

declare void @t(i32)
Eliminate more uses of llvm-as and llvm-dis. llvm-svn: 81290 2009-09-09 01:54:48 +02:00			`; RUN: llc < %s -march=x86-64 \| grep mov \| count 1`
Fix live variables issues: 1. If part of a register is re-defined, an implicit kill and an implicit def are added to denote read / mod / write. However, this should only be necessary if the register is actually read later. This is a performance issue. 2. If a sub-register is being defined, and it doesn't have a previous use, do not add a implicit kill to the last use of a super-register: = EAX, AX<imp-use,kill> ... AX = In this case, EAX is live but AX is killed, this is wrong and will cause the coalescer to do bad things. llvm-svn: 48521 2008-03-19 01:52:20 +01:00
			`define i32 @f() nounwind {`
			`tail call void @t( i32 1 ) nounwind`
			`ret i32 0`
			`}`

			`declare void @t(i32)`