llvm-6502/test/CodeGen/X86/2009-06-15-not-a-tail-call.ll

; RUN: llc < %s -march=x86 -tailcallopt | not grep TAILCALL 

; Bug 4396. This tail call can NOT be optimized.

declare fastcc i8* @_D3gcx2GC12mallocNoSyncMFmkZPv() nounwind

define fastcc i8* @_D3gcx2GC12callocNoSyncMFmkZPv() nounwind {
entry:
	%tmp6 = tail call fastcc i8* @_D3gcx2GC12mallocNoSyncMFmkZPv()		; <i8*> [#uses=2]
	%tmp9 = tail call i8* @memset(i8* %tmp6, i32 0, i64 2)		; <i8*> [#uses=0]
	ret i8* %tmp6
}

declare i8* @memset(i8*, i32, i64)
Eliminate more uses of llvm-as and llvm-dis. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81290 91177308-0d34-0410-b5e6-96231b3b80d8 2009-09-08 23:54:48 +00:00			`; RUN: llc < %s -march=x86 -tailcallopt \| not grep TAILCALL`
CheckTailCallReturnConstraints is missing a check on the incomming chain of the RETURN node. The incomming chain must be the outgoing chain of the CALL node. This causes the backend to identify tail calls that are not tail calls. This patch fixes this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73387 91177308-0d34-0410-b5e6-96231b3b80d8 2009-06-15 14:43:36 +00:00
			`; Bug 4396. This tail call can NOT be optimized.`

			`declare fastcc i8* @_D3gcx2GC12mallocNoSyncMFmkZPv() nounwind`

			`define fastcc i8* @_D3gcx2GC12callocNoSyncMFmkZPv() nounwind {`
			`entry:`
			`%tmp6 = tail call fastcc i8* @_D3gcx2GC12mallocNoSyncMFmkZPv() ; <i8*> [#uses=2]`
			`%tmp9 = tail call i8* @memset(i8* %tmp6, i32 0, i64 2) ; <i8*> [#uses=0]`
			`ret i8* %tmp6`
			`}`

			`declare i8* @memset(i8*, i32, i64)`