mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-16 11:05:54 +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
56 lines
1.3 KiB
LLVM
56 lines
1.3 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 @a_linear_impl_fig_1() nounwind {
|
|
0:
|
|
br label %"1"
|
|
1:
|
|
br label %"2"
|
|
2:
|
|
br label %"3"
|
|
3:
|
|
br i1 1, label %"13", label %"4"
|
|
4:
|
|
br i1 1, label %"5", label %"1"
|
|
5:
|
|
br i1 1, label %"8", label %"6"
|
|
6:
|
|
br i1 1, label %"7", label %"4"
|
|
7:
|
|
ret void
|
|
8:
|
|
br i1 1, label %"9", label %"1"
|
|
9:
|
|
br label %"10"
|
|
10:
|
|
br i1 1, label %"12", label %"11"
|
|
11:
|
|
br i1 1, label %"9", label %"8"
|
|
13:
|
|
br i1 1, label %"2", label %"1"
|
|
12:
|
|
switch i32 0, label %"1" [ i32 0, label %"9"
|
|
i32 1, label %"8"]
|
|
}
|
|
|
|
; CHECK-NOT: =>
|
|
; CHECK: [0] 0 => <Function Return>
|
|
; CHECK-NEXT: [1] 1 => 7
|
|
; CHECK-NEXT: [2] 1 => 4
|
|
; CHECK-NEXT: [2] 8 => 1
|
|
|
|
; STAT: 4 region - The # of regions
|
|
; STAT: 1 region - The # of simple regions
|
|
|
|
; BBIT: 0, 1, 2, 3, 13, 4, 5, 8, 9, 10, 12, 11, 6, 7,
|
|
; BBIT: 1, 2, 3, 13, 4, 5, 8, 9, 10, 12, 11, 6,
|
|
; BBIT: 1, 2, 3, 13,
|
|
; BBIT: 8, 9, 10, 12, 11,
|
|
|
|
; RNIT: 0, 1 => 7, 7,
|
|
; RNIT: 1 => 4, 4, 5, 8 => 1, 6,
|
|
; RNIT: 1, 2, 3, 13,
|
|
; RNIT: 8, 9, 10, 12, 11,
|