llvm/test/CodeGen/X86/longlong-deadload.ll

; RUN: llc < %s -march=x86 | not grep '4{(%...)}
; This should not load or store the top part of *P.

define void @test(i64* %P) nounwind  {
entry:
	%tmp1 = load i64* %P, align 8		; <i64> [#uses=1]
	%tmp2 = xor i64 %tmp1, 1		; <i64> [#uses=1]
	store i64 %tmp2, i64* %P, align 8
	ret void
}
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 \| not grep '4{(%...)}`
Make load->store deletion a bit smarter. This allows us to compile this: void test(long long P) { P ^= 1; } into just: _test: movl 4(%esp), %eax xorl $1, (%eax) ret instead of code like this: _test: movl 4(%esp), %ecx xorl $1, (%ecx) movl 4(%ecx), %edx movl %edx, 4(%ecx) ret git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45762 91177308-0d34-0410-b5e6-96231b3b80d8 2008-01-08 23:08:06 +00:00			`; This should not load or store the top part of *P.`

			`define void @test(i64* %P) nounwind {`
			`entry:`
			`%tmp1 = load i64* %P, align 8 ; <i64> [#uses=1]`
			`%tmp2 = xor i64 %tmp1, 1 ; <i64> [#uses=1]`
			`store i64 %tmp2, i64* %P, align 8`
			`ret void`
			`}`