llvm-6502/test/Transforms/SimplifyCFG/trapping-load-unreachable.ll

; RUN: opt < %s -simplifycfg -S | grep {volatile load}
; PR2967

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"
target triple = "i386-pc-linux-gnu"

define void @foo(i32 %x) nounwind {
entry:
        %0 = icmp eq i32 %x, 0          ; <i1> [#uses=1]
        br i1 %0, label %bb, label %return

bb:             ; preds = %entry
        %1 = volatile load i32* null            ; <i32> [#uses=0]
        unreachable
        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 -simplifycfg -S \| grep {volatile load}`
Fix PR2967 by not deleting volatile load/stores that occur before unreachable. I don't really see this as being needed, but there is little harm from doing it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58385 91177308-0d34-0410-b5e6-96231b3b80d8 2008-10-29 17:46:26 +00:00			`; PR2967`

			`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"`
			`target triple = "i386-pc-linux-gnu"`

			`define void @foo(i32 %x) nounwind {`
			`entry:`
			`%0 = icmp eq i32 %x, 0 ; <i1> [#uses=1]`
			`br i1 %0, label %bb, label %return`

			`bb: ; preds = %entry`
			`%1 = volatile load i32* null ; <i32> [#uses=0]`
			`unreachable`
			`br label %return`
			`return: ; preds = %entry`
			`ret void`
			`}`