mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-25 14:32:53 +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
43 lines
1.1 KiB
LLVM
43 lines
1.1 KiB
LLVM
; RUN: opt -regions -analyze < %s | FileCheck %s
|
|
; RUN: opt -regions -stats -analyze < %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 @BZ2_blockSort() nounwind {
|
|
start:
|
|
br label %while
|
|
|
|
while:
|
|
br label %while.body134.i.i
|
|
|
|
while.body134.i.i:
|
|
br i1 1, label %end, label %w
|
|
|
|
w:
|
|
br label %if.end140.i.i
|
|
|
|
if.end140.i.i:
|
|
br i1 1, label %while.end186.i.i, label %if.end183.i.i
|
|
|
|
if.end183.i.i:
|
|
br label %while.body134.i.i
|
|
|
|
while.end186.i.i:
|
|
br label %while
|
|
|
|
end:
|
|
ret void
|
|
}
|
|
; CHECK-NOT: =>
|
|
; CHECK: [0] start => <Function Return>
|
|
; CHECK: [1] while => end
|
|
|
|
; STAT: 2 region - The # of regions
|
|
; STAT: 1 region - The # of simple regions
|
|
|
|
; BBIT: start, while, while.body134.i.i, end, w, if.end140.i.i, while.end186.i.i, if.end183.i.i,
|
|
; BBIT: while, while.body134.i.i, w, if.end140.i.i, while.end186.i.i, if.end183.i.i,
|
|
|
|
; RNIT: start, while => end, end,
|
|
; RNIT: while, while.body134.i.i, w, if.end140.i.i, while.end186.i.i, if.end183.i.i,
|