mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-04 07:29:20 +00:00
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
|
|
; RUN: opt -regions -stats < %s |& FileCheck -check-prefix=STAT %s
|
|
; RUN: opt -regions -print-region-style=bb -analyze < %s |& FileCheck -check-prefix=BBIT %s
|
|
; RUN: opt -regions -print-region-style=rn -analyze < %s |& FileCheck -check-prefix=RNIT %s
|
|
|
|
define void @MAIN__() nounwind {
|
|
entry:
|
|
br label %__label_002001.outer
|
|
|
|
__label_002001.outer: ; preds = %bb236, %bb92
|
|
br label %__label_002001
|
|
|
|
__label_002001: ; preds = %bb229, %__label_002001.outer
|
|
br i1 1, label %bb93, label %__label_000020
|
|
|
|
bb93: ; preds = %__label_002001
|
|
br i1 1, label %__label_000020, label %bb197
|
|
|
|
bb197: ; preds = %bb193
|
|
br i1 1, label %bb229, label %bb224
|
|
|
|
bb224: ; preds = %bb223, %bb227
|
|
br i1 1, label %bb229, label %bb224
|
|
|
|
bb229: ; preds = %bb227, %bb223
|
|
br i1 1, label %__label_002001, label %__label_002001.outer
|
|
|
|
__label_000020: ; preds = %__label_002001, %bb194
|
|
ret void
|
|
}
|
|
|
|
; CHECK-NOT: =>
|
|
; CHECK: [0] entry => <Function Return>
|
|
; CHECK-NEXT: [1] __label_002001.outer => __label_000020
|
|
; CHECK-NEXT; [2] bb197 => bb229
|
|
; CHECK-NEXT; [3] bb224 => bb229
|
|
|
|
; STAT: 4 region - The # of regions
|
|
; STAT: 1 region - The # of simple regions
|
|
|
|
; BBIT: entry, __label_002001.outer, __label_002001, bb93, __label_000020, bb197, bb229, bb224,
|
|
; BBIT: __label_002001.outer, __label_002001, bb93, bb197, bb229, bb224,
|
|
; BBIT: bb197, bb224,
|
|
; BBIT: bb224,
|
|
|
|
; RNIT: entry, __label_002001.outer => __label_000020, __label_000020,
|
|
; RNIT: __label_002001.outer, __label_002001, bb93, bb197 => bb229, bb229,
|
|
; RNIT: bb197, bb224 => bb229,
|
|
; RNIT: bb224,
|