mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-12 15:05:06 +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
61 lines
1.5 KiB
LLVM
61 lines
1.5 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 internal fastcc zeroext i8 @handle_compress() nounwind {
|
|
end165:
|
|
br i1 1, label %false239, label %true181
|
|
|
|
true181:
|
|
br i1 1, label %then187, label %else232
|
|
|
|
then187:
|
|
br label %end265
|
|
|
|
else232:
|
|
br i1 1, label %false239, label %then245
|
|
|
|
false239:
|
|
br i1 1, label %then245, label %else259
|
|
|
|
then245:
|
|
br i1 1, label %then251, label %end253
|
|
|
|
then251:
|
|
br label %end253
|
|
|
|
end253:
|
|
br label %end265
|
|
|
|
else259:
|
|
br label %end265
|
|
|
|
end265:
|
|
br i1 1, label %then291, label %end298
|
|
|
|
then291:
|
|
br label %end298
|
|
|
|
end298:
|
|
ret i8 1
|
|
}
|
|
|
|
; CHECK-NOT: =>
|
|
; CHECK: [0] end165 => <Function Return>
|
|
; CHECK-NEXT: [1] end165 => end265
|
|
; CHECK-NEXT: [2] then245 => end253
|
|
; CHECK-NEXT: [1] end265 => end298
|
|
|
|
; STAT: 4 region - The # of regions
|
|
|
|
; BBIT: end165, false239, then245, then251, end253, end265, then291, end298, else259, true181, then187, else232,
|
|
; BBIT: end165, false239, then245, then251, end253, else259, true181, then187, else232,
|
|
; BBIT: then245, then251,
|
|
; BBIT: end265, then291,
|
|
|
|
; RNIT: end165 => end265, end265 => end298, end298,
|
|
; RNIT: end165, false239, then245 => end253, end253, else259, true181, then187, else232,
|
|
; RNIT: then245, then251,
|
|
; RNIT: end265, then291,
|