mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-31 08:16:47 +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
53 lines
1.1 KiB
LLVM
53 lines
1.1 KiB
LLVM
; RUN: opt -regions -analyze < %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 @normal_condition() nounwind {
|
|
0:
|
|
br label %"7"
|
|
7:
|
|
br i1 1, label %"1", label %"8"
|
|
1:
|
|
br i1 1, label %"2", label %"3"
|
|
2:
|
|
br label %"5"
|
|
5:
|
|
br i1 1, label %"11", label %"12"
|
|
11:
|
|
br label %"6"
|
|
12:
|
|
br label %"6"
|
|
6:
|
|
br label %"2"
|
|
8:
|
|
br label %"9"
|
|
9:
|
|
br i1 1, label %"13", label %"14"
|
|
13:
|
|
br label %"10"
|
|
14:
|
|
br label %"10"
|
|
10:
|
|
br label %"8"
|
|
3:
|
|
br label %"4"
|
|
4:
|
|
ret void
|
|
}
|
|
; CHECK-NOT: =>
|
|
; CHECK: [0] 0 => <Function Return>
|
|
; CHECK-NEXT: [1] 1 => 3
|
|
; CHECK-NEXT: [1] 7 => 1
|
|
; STAT: 3 region - The # of regions
|
|
; STAT: 2 region - The # of simple regions
|
|
|
|
; BBIT: 0, 7, 1, 2, 5, 11, 6, 12, 3, 4, 8, 9, 13, 10, 14,
|
|
; BBIT: 7, 8, 9, 13, 10, 14,
|
|
; BBIT: 1, 2, 5, 11, 6, 12,
|
|
|
|
; RNIT: 0, 7 => 1, 1 => 3, 3, 4,
|
|
; RNIT: 7, 8, 9, 13, 10, 14,
|
|
; RNIT: 1, 2, 5, 11, 6, 12,
|