54 lines
1.3 KiB
LLVM
54 lines
1.3 KiB
LLVM
|
; RUN: opt -loop-unroll -debug-only=loop-unroll -disable-output < %s
|
||
|
|
; REQUIRES: asserts
|
||
|
|
; Compile this test with debug flag on to verify domtree right after loop unrolling.
|
||
|
|
target datalayout = "E-m:e-i1:8:16-i8:8:16-i64:64-f128:64-v128:64-a:8:16-n32:64"
|
||
|
|
|
||
|
|
; PR27157
|
||
|
|
define void @foo() {
|
||
|
|
entry:
|
||
|
|
br label %loop_header
|
||
|
|
loop_header:
|
||
|
|
%iv = phi i64 [ 0, %entry ], [ %iv_next, %loop_latch ]
|
||
|
|
br i1 undef, label %loop_latch, label %loop_exiting_bb1
|
||
|
|
loop_exiting_bb1:
|
||
|
|
br i1 false, label %loop_exiting_bb2, label %exit1.loopexit
|
||
|
|
loop_exiting_bb2:
|
||
|
|
br i1 false, label %loop_latch, label %bb
|
||
|
|
bb:
|
||
|
|
br label %exit1
|
||
|
|
loop_latch:
|
||
|
|
%iv_next = add nuw nsw i64 %iv, 1
|
||
|
|
%cmp = icmp ne i64 %iv_next, 2
|
||
|
|
br i1 %cmp, label %loop_header, label %exit2
|
||
|
|
exit1.loopexit:
|
||
|
|
br label %exit1
|
||
|
|
exit1:
|
||
|
|
ret void
|
||
|
|
exit2:
|
||
|
|
ret void
|
||
|
|
}
|
||
|
|
|
||
|
|
define void @foo2() {
|
||
|
|
entry:
|
||
|
|
br label %loop.header
|
||
|
|
loop.header:
|
||
|
|
%iv = phi i32 [ 0, %entry ], [ %iv.inc, %latch ]
|
||
|
|
%iv.inc = add i32 %iv, 1
|
||
|
|
br i1 undef, label %diamond, label %latch
|
||
|
|
diamond:
|
||
|
|
br i1 undef, label %left, label %right
|
||
|
|
left:
|
||
|
|
br i1 undef, label %exit, label %merge
|
||
|
|
right:
|
||
|
|
br i1 undef, label %exit, label %merge
|
||
|
|
merge:
|
||
|
|
br label %latch
|
||
|
|
latch:
|
||
|
|
%end.cond = icmp eq i32 %iv, 1
|
||
|
|
br i1 %end.cond, label %exit1, label %loop.header
|
||
|
|
exit:
|
||
|
|
ret void
|
||
|
|
exit1:
|
||
|
|
ret void
|
||
|
|
}
|