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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". llvm-svn: 109089
39 lines
1.1 KiB
LLVM
39 lines
1.1 KiB
LLVM
; 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 @normal_condition_0() nounwind {
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bb38: ; preds = %bb34, %bb34, %bb37
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switch i32 undef, label %bb42 [
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i32 67, label %bb42
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i32 90, label %bb41
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]
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bb41: ; preds = %bb38
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br label %bb42
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bb42: ; preds = %bb38, %bb38, %bb41
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ret void
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}
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; BBIT: bb38, bb42, bb41,
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; BBIT: bb38, bb41,
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; RNIT: bb38 => bb42, bb42,
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; RNIT: bb38, bb41,
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define void @normal_condition_1() nounwind {
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bb38: ; preds = %bb34, %bb34, %bb37
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switch i32 undef, label %bb41 [
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i32 67, label %bb42
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i32 90, label %bb42
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]
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bb41: ; preds = %bb38
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br label %bb42
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bb42: ; preds = %bb38, %bb38, %bb41
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ret void
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}
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; BBIT: bb38, bb41, bb42,
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; BBIT: bb38, bb41,
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; RNIT: bb38 => bb42, bb42,
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; RNIT: bb38, bb41,
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