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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
50 lines
1.8 KiB
LLVM
50 lines
1.8 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 void @MAIN__() nounwind {
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entry:
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br label %__label_002001.outer
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__label_002001.outer: ; preds = %bb236, %bb92
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br label %__label_002001
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__label_002001: ; preds = %bb229, %__label_002001.outer
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br i1 1, label %bb93, label %__label_000020
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bb93: ; preds = %__label_002001
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br i1 1, label %__label_000020, label %bb197
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bb197: ; preds = %bb193
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br i1 1, label %bb229, label %bb224
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bb224: ; preds = %bb223, %bb227
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br i1 1, label %bb229, label %bb224
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bb229: ; preds = %bb227, %bb223
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br i1 1, label %__label_002001, label %__label_002001.outer
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__label_000020: ; preds = %__label_002001, %bb194
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ret void
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}
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; CHECK-NOT: =>
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; CHECK: [0] entry => <Function Return>
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; CHECK-NEXT: [1] __label_002001.outer => __label_000020
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; CHECK-NEXT; [2] bb197 => bb229
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; CHECK-NEXT; [3] bb224 => bb229
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; STAT: 4 region - The # of regions
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; STAT: 1 region - The # of simple regions
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; BBIT: entry, __label_002001.outer, __label_002001, bb93, __label_000020, bb197, bb229, bb224,
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; BBIT: __label_002001.outer, __label_002001, bb93, bb197, bb229, bb224,
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; BBIT: bb197, bb224,
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; BBIT: bb224,
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; RNIT: entry, __label_002001.outer => __label_000020, __label_000020,
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; RNIT: __label_002001.outer, __label_002001, bb93, bb197 => bb229, bb229,
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; RNIT: bb197, bb224 => bb229,
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; RNIT: bb224,
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