llvm-6502/test/Transforms/InstCombine/volatile_store.ll

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

@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
}
Move "atomic" and "volatile" designations on instructions after the opcode of the instruction. Note that this change affects the existing non-atomic load and store instructions; the parser now accepts both forms, and the change is noted in the release notes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137527 91177308-0d34-0410-b5e6-96231b3b80d8 2011-08-12 22:50:01 +00:00			`; RUN: opt < %s -instcombine -S \| grep {store volatile}`
			`; RUN: opt < %s -instcombine -S \| grep {load volatile}`
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`
			`}`