mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-21 00:32:23 +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
1.6 KiB
LLVM
50 lines
1.6 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 @meread_() nounwind {
|
|
entry:
|
|
br label %bb23
|
|
|
|
bb23:
|
|
br label %bb.i
|
|
|
|
bb.i: ; preds = %bb.i, %bb54
|
|
br label %pflini_.exit
|
|
|
|
pflini_.exit: ; preds = %bb.i
|
|
br label %bb58thread-split
|
|
|
|
bb58thread-split: ; preds = %bb64, %bb61, %pflini_.exit
|
|
br label %bb58
|
|
|
|
bb58: ; preds = %bb60, %bb58thread-split
|
|
br i1 1, label %bb59, label %bb23
|
|
|
|
bb59: ; preds = %bb58
|
|
switch i32 1, label %bb60 [
|
|
i32 1, label %l98
|
|
]
|
|
|
|
bb60: ; preds = %bb59
|
|
br i1 1, label %bb61, label %bb58
|
|
|
|
bb61: ; preds = %bb60
|
|
br label %bb58thread-split
|
|
|
|
l98: ; preds = %bb69, %bb59
|
|
ret void
|
|
}
|
|
; CHECK-NOT: =>
|
|
; CHECK: [0] entry => <Function Return>
|
|
; CHECK: [1] bb23 => l98
|
|
; STAT: 2 region - The # of regions
|
|
; STAT: 1 region - The # of simple regions
|
|
|
|
; BBIT: entry, bb23, bb.i, pflini_.exit, bb58thread-split, bb58, bb59, bb60, bb61, l98,
|
|
; BBIT: bb23, bb.i, pflini_.exit, bb58thread-split, bb58, bb59, bb60, bb61,
|
|
|
|
; RNIT: entry, bb23 => l98, l98,
|
|
; RNIT: bb23, bb.i, pflini_.exit, bb58thread-split, bb58, bb59, bb60, bb61,
|