llvm/test/Transforms/InstCombine/2008-04-29-VolatileLoadMerge.ll

; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {volatile load} | count 1
; PR2262
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i386-apple-darwin8"
@g_1 = internal global i32 0		; <i32*> [#uses=3]
@.str = internal constant [13 x i8] c"checksum = 0\00"		; <[13 x i8]*> [#uses=1]
@llvm.used = appending global [1 x i8*] [ i8* bitcast (i32 ()* @main to i8*) ], section "llvm.metadata"		; <[1 x i8*]*> [#uses=0]

define i32 @main() nounwind  {
entry:
	%tmp93 = icmp slt i32 0, 10		; <i1> [#uses=0]
	%tmp34 = volatile load i32* @g_1, align 4		; <i32> [#uses=1]
	br label %bb

bb:		; preds = %bb, %entry
	%b.0.reg2mem.0 = phi i32 [ 0, %entry ], [ %tmp6, %bb ]		; <i32> [#uses=1]
	%tmp3.reg2mem.0 = phi i32 [ %tmp34, %entry ], [ %tmp3, %bb ]		; <i32> [#uses=1]
	%tmp4 = add i32 %tmp3.reg2mem.0, 5		; <i32> [#uses=1]
	volatile store i32 %tmp4, i32* @g_1, align 4
	%tmp6 = add i32 %b.0.reg2mem.0, 1		; <i32> [#uses=2]
	%tmp9 = icmp slt i32 %tmp6, 10		; <i1> [#uses=1]
	%tmp3 = volatile load i32* @g_1, align 4		; <i32> [#uses=1]
	br i1 %tmp9, label %bb, label %bb11

bb11:		; preds = %bb
	%tmp14 = call i32 @puts( i8* getelementptr ([13 x i8]* @.str, i32 0, i32 0) ) nounwind 		; <i32> [#uses=0]
	ret i32 0
}

declare i32 @puts(i8*)