llvm/test/Transforms/InstCombine/volatile_store.ll

; RUN: opt < %s -instcombine -S | grep {volatile store}
; RUN: opt < %s -instcombine -S | grep {volatile load}

@x = weak global i32 0		; <i32*> [#uses=2]

define void @self_assign_1() {
entry:
	%tmp = volatile load i32* @x		; <i32> [#uses=1]
	volatile store i32 %tmp, i32* @x
	br label %return

return:		; preds = %entry
	ret void
}
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 -instcombine -S \| grep {volatile store}`
			`; RUN: opt < %s -instcombine -S \| grep {volatile load}`
Don't zap back to back volatile load/stores git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41759 91177308-0d34-0410-b5e6-96231b3b80d8 2007-09-07 05:33:03 +00:00
			`@x = weak global i32 0 ; <i32*> [#uses=2]`

			`define void @self_assign_1() {`
			`entry:`
			`%tmp = volatile load i32* @x ; <i32> [#uses=1]`
			`volatile store i32 %tmp, i32* @x`
			`br label %return`

			`return: ; preds = %entry`
			`ret void`
			`}`