llvm-6502/test/Analysis/BasicAA/cas.ll

; RUN: opt < %s -basicaa -gvn -S | grep load | count 1

@flag0 = internal global i32 zeroinitializer
@turn = internal global i32 zeroinitializer


define i32 @main() {
  %a = load i32* @flag0
	%b = tail call i32 @llvm.atomic.swap.i32.p0i32(i32* @turn, i32 1)
  %c = load i32* @flag0
	ret i32 %c
}

declare i32 @llvm.atomic.swap.i32.p0i32(i32*, i32) nounwind
Change tests from "opt %s" to "opt < %s" so that opt doesn't see the input filename so that opt doesn't print the input filename in the output so that grep lines in the tests don't unintentionally match strings in the input filename. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81537 91177308-0d34-0410-b5e6-96231b3b80d8 2009-09-11 18:01:28 +00:00			`; RUN: opt < %s -basicaa -gvn -S \| grep load \| count 1`
Finish making AliasAnalysis aware of the fact that most atomic intrinsics only dereference their arguments, and enhance BasicAA to make use of this fact when computing ModRef info. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63718 91177308-0d34-0410-b5e6-96231b3b80d8 2009-02-04 05:16:46 +00:00
			`@flag0 = internal global i32 zeroinitializer`
			`@turn = internal global i32 zeroinitializer`


			`define i32 @main() {`
			`%a = load i32* @flag0`
			`%b = tail call i32 @llvm.atomic.swap.i32.p0i32(i32* @turn, i32 1)`
			`%c = load i32* @flag0`
			`ret i32 %c`
			`}`

			`declare i32 @llvm.atomic.swap.i32.p0i32(i32*, i32) nounwind`