llvm-project/llvm/test/Transforms/GVN/2008-07-02-Unreachable.ll

36 lines
708 B
LLVM

; RUN: opt < %s -gvn -S | grep {ret i8 \[%\]tmp3}
; PR2503
@g_3 = external global i8 ; <i8*> [#uses=2]
define i8 @func_1() nounwind {
entry:
br i1 false, label %ifelse, label %ifthen
ifthen: ; preds = %entry
br label %ifend
ifelse: ; preds = %entry
%tmp3 = load i8* @g_3 ; <i8> [#uses=0]
br label %forcond.thread
forcond.thread: ; preds = %ifelse
br label %afterfor
forcond: ; preds = %forinc
br i1 false, label %afterfor, label %forbody
forbody: ; preds = %forcond
br label %forinc
forinc: ; preds = %forbody
br label %forcond
afterfor: ; preds = %forcond, %forcond.thread
%tmp10 = load i8* @g_3 ; <i8> [#uses=0]
ret i8 %tmp10
ifend: ; preds = %afterfor, %ifthen
ret i8 0
}