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
29 lines
646 B
LLVM
29 lines
646 B
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 @normal_condition() nounwind {
|
|
0:
|
|
br label %"1"
|
|
1:
|
|
br i1 1, label %"2", label %"3"
|
|
2:
|
|
br label %"4"
|
|
3:
|
|
br label %"4"
|
|
4:
|
|
ret void
|
|
}
|
|
|
|
; CHECK-NOT: =>
|
|
; CHECK: [0] 0 => <Function Return>
|
|
; CHECK-NEXT: [1] 1 => 4
|
|
; STAT: 2 region - The # of regions
|
|
|
|
; BBIT: 0, 1, 2, 4, 3,
|
|
; BBIT: 1, 2, 3,
|
|
|
|
; RNIT: 0, 1 => 4, 4,
|
|
; RNIT: 1, 2, 3,
|