maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/llvm/test/Transforms/LoopUnroll/not-rotated.ll

27 lines
617 B
LLVM
Raw Normal View History

[LoopUnroll] Don't try to unroll non canonical loops. The current Loop Unroll implementation works with loops having a single latch that contains a conditional branch to a block outside the loop (the other successor is, by defition of latch, the header). If this precondition doesn't hold, avoid unrolling the loop as the code is not ready to handle such circumstances. Differential Revision: https://reviews.llvm.org/D32261 llvm-svn: 301239
2017-04-25 04:14:11 +08:00
; PR28103
; Bail out if the two successors are not the header
; and another bb outside of the loop. This case is not
; properly handled by LoopUnroll, currently.
; RUN: opt -loop-unroll -verify-dom-info %s
[LoopUnroll] Fix a test. REQUIRE should be REQUIRES. Found by inspection. llvm-svn: 302909
2017-05-12 23:30:58 +08:00
; REQUIRES: asserts
[LoopUnroll] Don't try to unroll non canonical loops. The current Loop Unroll implementation works with loops having a single latch that contains a conditional branch to a block outside the loop (the other successor is, by defition of latch, the header). If this precondition doesn't hold, avoid unrolling the loop as the code is not ready to handle such circumstances. Differential Revision: https://reviews.llvm.org/D32261 llvm-svn: 301239
2017-04-25 04:14:11 +08:00
define void @tinkywinky(i1 %patatino) {
entry:
br label %header1
header1:
%indvars.iv = phi i64 [ 1, %body2 ], [ 0, %entry ]
%exitcond = icmp ne i64 %indvars.iv, 1
br i1 %exitcond, label %body1, label %exit
body1:
br i1 %patatino, label %body2, label %sink
body2:
br i1 %patatino, label %header1, label %body3
body3:
br label %sink
sink:
br label %body2
exit:
ret void
}