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llvm-mirror/test/Transforms/LoopSimplify/2003-12-10-ExitBlocksProblem.ll
Dan Gohman 205b641954 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.

llvm-svn: 81537
2009-09-11 18:01:28 +00:00

37 lines
1.1 KiB
LLVM

; LoopSimplify is breaking LICM on this testcase because the exit blocks from
; the loop are reachable from more than just the exit nodes: the exit blocks
; have predecessors from outside of the loop!
;
; This is distilled from a monsterous crafty example.
; RUN: opt < %s -licm -disable-output
@G = weak global i32 0 ; <i32*> [#uses=7]
define i32 @main() {
entry:
store i32 123, i32* @G
br label %loopentry.i
loopentry.i: ; preds = %endif.1.i, %entry
%tmp.0.i = load i32* @G ; <i32> [#uses=1]
%tmp.1.i = icmp eq i32 %tmp.0.i, 123 ; <i1> [#uses=1]
br i1 %tmp.1.i, label %Out.i, label %endif.0.i
endif.0.i: ; preds = %loopentry.i
%tmp.3.i = load i32* @G ; <i32> [#uses=1]
%tmp.4.i = icmp eq i32 %tmp.3.i, 126 ; <i1> [#uses=1]
br i1 %tmp.4.i, label %ExitBlock.i, label %endif.1.i
endif.1.i: ; preds = %endif.0.i
%tmp.6.i = load i32* @G ; <i32> [#uses=1]
%inc.i = add i32 %tmp.6.i, 1 ; <i32> [#uses=1]
store i32 %inc.i, i32* @G
br label %loopentry.i
Out.i: ; preds = %loopentry.i
store i32 0, i32* @G
br label %ExitBlock.i
ExitBlock.i: ; preds = %Out.i, %endif.0.i
%tmp.7.i = load i32* @G ; <i32> [#uses=1]
ret i32 %tmp.7.i
}