OSchip
/
llvm-project
mirror of https://github.com/THU-DSP-LAB/llvm-project.git
13
0
Fork 6
Code Issues Packages Projects Releases Wiki Activity

[NFC][SCEV] Add reproducers for umin_seq crashes 

As reported in https://reviews.llvm.org/D116766#3233042
This commit is contained in:
Roman Lebedev 2022-01-11 15:33:53 +03:00
parent 8dba4d42f5
commit e0772cf00f
No known key found for this signature in database
GPG Key ID: 083C3EBB4A1689E0
1 changed files with 70 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

70
llvm/test/Analysis/ScalarEvolution/exit-count-select-safe.ll
View File

@ -124,3 +124,73 @@ loop:
exit: exit:
ret i32 %i ret i32 %i
} }
define i32 @computeSCEVAtScope(i32 %d.0) {
; CHECK-LABEL: 'computeSCEVAtScope'
; CHECK-NEXT: Classifying expressions for: @computeSCEVAtScope
; CHECK-NEXT: %d.1 = phi i32 [ %inc, %for.body ], [ %d.0, %for.cond.preheader ]
; CHECK-NEXT: --> {%d.0,+,1}<nsw><%for.cond> U: full-set S: full-set Exits: 0 LoopDispositions: { %for.cond: Computable, %while.cond: Variant }
; CHECK-NEXT: %e.1 = phi i32 [ %inc3, %for.body ], [ %d.0, %for.cond.preheader ]
; CHECK-NEXT: --> {%d.0,+,1}<nsw><%for.cond> U: full-set S: full-set Exits: 0 LoopDispositions: { %for.cond: Computable, %while.cond: Variant }
; CHECK-NEXT: %0 = select i1 %tobool1, i1 %tobool2, i1 false
; CHECK-NEXT: --> %0 U: full-set S: full-set Exits: false LoopDispositions: { %for.cond: Variant, %while.cond: Variant }
; CHECK-NEXT: %inc = add nsw i32 %d.1, 1
; CHECK-NEXT: --> {(1 + %d.0),+,1}<nw><%for.cond> U: full-set S: full-set Exits: 1 LoopDispositions: { %for.cond: Computable, %while.cond: Variant }
; CHECK-NEXT: %inc3 = add nsw i32 %e.1, 1
; CHECK-NEXT: --> {(1 + %d.0),+,1}<nw><%for.cond> U: full-set S: full-set Exits: 1 LoopDispositions: { %for.cond: Computable, %while.cond: Variant }
; CHECK-NEXT: %f.1 = phi i32 [ %inc8, %for.body5 ], [ 0, %for.cond4.preheader ]
; CHECK-NEXT: --> {0,+,1}<%for.cond4> U: [0,1) S: [0,1) Exits: 0 LoopDispositions: { %for.cond4: Computable, %while.cond: Variant }
; CHECK-NEXT: %inc8 = add i32 %f.1, 1
; CHECK-NEXT: --> {1,+,1}<%for.cond4> U: [1,2) S: [1,2) Exits: 1 LoopDispositions: { %for.cond4: Computable, %while.cond: Variant }
; CHECK-NEXT: Determining loop execution counts for: @computeSCEVAtScope
; CHECK-NEXT: Loop %for.cond: backedge-taken count is (-1 * %d.0)
; CHECK-NEXT: Loop %for.cond: max backedge-taken count is -1
; CHECK-NEXT: Loop %for.cond: Predicated backedge-taken count is (-1 * %d.0)
; CHECK-NEXT: Predicates:
; CHECK: Loop %for.cond: Trip multiple is 1
; CHECK-NEXT: Loop %for.cond4: backedge-taken count is 0
; CHECK-NEXT: Loop %for.cond4: max backedge-taken count is 0
; CHECK-NEXT: Loop %for.cond4: Predicated backedge-taken count is 0
; CHECK-NEXT: Predicates:
; CHECK: Loop %for.cond4: Trip multiple is 1
; CHECK-NEXT: Loop %while.cond: <multiple exits> Unpredictable backedge-taken count.
; CHECK-NEXT: Loop %while.cond: Unpredictable max backedge-taken count.
; CHECK-NEXT: Loop %while.cond: Unpredictable predicated backedge-taken count.
;
entry:
br label %while.cond
while.cond.loopexit: ; preds = %for.cond4
br label %while.cond
while.cond: ; preds = %while.cond.loopexit, %entry
br label %for.cond.preheader
for.cond.preheader: ; preds = %while.cond
br label %for.cond
for.cond: ; preds = %for.body, %for.cond.preheader
%d.1 = phi i32 [ %inc, %for.body ], [ %d.0, %for.cond.preheader ]
%e.1 = phi i32 [ %inc3, %for.body ], [ %d.0, %for.cond.preheader ]
%tobool1 = icmp ne i32 %e.1, 0
%tobool2 = icmp ne i32 %d.1, 0
%0 = select i1 %tobool1, i1 %tobool2, i1 false
br i1 %0, label %for.body, label %for.cond4.preheader
for.cond4.preheader: ; preds = %for.cond
br label %for.cond4
for.body: ; preds = %for.cond
%inc = add nsw i32 %d.1, 1
%inc3 = add nsw i32 %e.1, 1
br label %for.cond
for.cond4: ; preds = %for.body5, %for.cond4.preheader
%f.1 = phi i32 [ %inc8, %for.body5 ], [ 0, %for.cond4.preheader ]
%exitcond.not = icmp eq i32 %f.1, %e.1
br i1 %exitcond.not, label %while.cond.loopexit, label %for.body5
for.body5: ; preds = %for.cond4
%inc8 = add i32 %f.1, 1
br label %for.cond4
}