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f96b006367
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
45 lines
1.1 KiB
LLVM
45 lines
1.1 KiB
LLVM
; RUN: opt -regions -analyze < %s | FileCheck %s
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; RUN: opt -regions -stats < %s |& FileCheck -check-prefix=STAT %s
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; RUN: opt -regions -print-region-style=bb -analyze < %s |& FileCheck -check-prefix=BBIT %s
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; RUN: opt -regions -print-region-style=rn -analyze < %s |& FileCheck -check-prefix=RNIT %s
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define internal fastcc void @compress() nounwind {
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end33:
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br i1 1, label %end124, label %lor.lhs.false95
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lor.lhs.false95:
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br i1 1, label %then107, label %end172
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then107:
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br i1 1, label %end124, label %then113
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then113:
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br label %end124
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end124:
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br label %exit
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end172:
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br label %exit
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exit:
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unreachable
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}
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; CHECK-NOT: =>
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; CHECK: [0] end33 => <Function Return>
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; CHECK-NEXT: [1] end33 => exit
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; CHECK-NEXT: [2] then107 => end124
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; STAT: 3 region - The # of regions
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; BBIT: end33, end124, exit, lor.lhs.false95, then107, then113, end172,
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; BBIT: end33, end124, lor.lhs.false95, then107, then113, end172,
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; BBIT: then107, then113,
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; RNIT: end33 => exit, exit,
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; RNIT: end33, end124, lor.lhs.false95, then107 => end124, end172,
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; RNIT: then107, then113,
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