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llvm-mirror/test/Transforms/SimplifyCFG/trapping-load-unreachable.ll
Chris Lattner 4af91a146a 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.

llvm-svn: 58385
2008-10-29 17:46:26 +00:00

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549 B
LLVM

; RUN: llvm-as < %s | opt -simplifycfg | llvm-dis | 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
}