llvm-6502/test/Analysis/RegionInfo/infinite_loop.ll
Tobias Grosser f96b006367 Add new RegionInfo pass.
The RegionInfo pass detects single entry single exit regions in a function,
where a region is defined as any subgraph that is connected to the remaining
graph at only two spots.
Furthermore an hierarchical region tree is built.
Use it by calling "opt -regions analyze" or "opt -view-regions".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109089 91177308-0d34-0410-b5e6-96231b3b80d8
2010-07-22 07:46:31 +00:00

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402 B
LLVM

; RUN: opt -regions -analyze < %s
; RUN: opt -regions -stats < %s |& FileCheck -check-prefix=STAT %s
define void @normal_condition() nounwind {
0:
br label %"1"
1:
br i1 1, label %"2", label %"3"
2:
br label %"2"
3:
br label %"4"
4:
ret void
}
; CHECK-NOT: =>
; CHECK: [0] 0 => <Function Return>
; CHECK: [1] 1 => 4
; STAT: 2 region - The # of regions
; STAT: 1 region - The # of simple regions