mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-22 09:29:31 +00:00
2a747bf1c5
During loop-unroll, loop exits from the current loop may end up in in different outer loop. This requires to re-form LCSSA recursively for one level down from the outer most loop where loop exits are landed during unroll. This fixes PR18861. Differential Revision: http://reviews.llvm.org/D2976 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209796 91177308-0d34-0410-b5e6-96231b3b80d8
44 lines
1.6 KiB
LLVM
44 lines
1.6 KiB
LLVM
; RUN: opt < %s -loop-unroll -indvars -disable-output
|
|
|
|
@b = external global i32, align 4
|
|
|
|
; Function Attrs: nounwind uwtable
|
|
define void @fn1() #0 {
|
|
entry:
|
|
br label %for.cond1thread-pre-split
|
|
|
|
for.cond1thread-pre-split: ; preds = %for.inc8, %entry
|
|
%storemerge1 = phi i32 [ 0, %entry ], [ %inc9, %for.inc8 ]
|
|
br i1 undef, label %for.inc8, label %for.cond2.preheader.lr.ph
|
|
|
|
for.cond2.preheader.lr.ph: ; preds = %for.cond1thread-pre-split
|
|
br label %for.cond2.preheader
|
|
|
|
for.cond2.preheader: ; preds = %for.inc5, %for.cond2.preheader.lr.ph
|
|
br label %for.cond2
|
|
|
|
for.cond2: ; preds = %for.body3, %for.cond2.preheader
|
|
%storemerge = phi i32 [ %add, %for.body3 ], [ 0, %for.cond2.preheader ]
|
|
%cmp = icmp slt i32 %storemerge, 1
|
|
br i1 %cmp, label %for.body3, label %for.inc5
|
|
|
|
for.body3: ; preds = %for.cond2
|
|
%tobool4 = icmp eq i32 %storemerge, 0
|
|
%add = add nsw i32 %storemerge, 1
|
|
br i1 %tobool4, label %for.cond2, label %if.then
|
|
|
|
if.then: ; preds = %for.body3
|
|
store i32 %storemerge1, i32* @b, align 4
|
|
ret void
|
|
|
|
for.inc5: ; preds = %for.cond2
|
|
br i1 undef, label %for.cond1.for.inc8_crit_edge, label %for.cond2.preheader
|
|
|
|
for.cond1.for.inc8_crit_edge: ; preds = %for.inc5
|
|
br label %for.inc8
|
|
|
|
for.inc8: ; preds = %for.cond1.for.inc8_crit_edge, %for.cond1thread-pre-split
|
|
%inc9 = add nsw i32 %storemerge1, 1
|
|
br label %for.cond1thread-pre-split
|
|
}
|