44773b798a
This patch is making sure that we use getTopMostExitingLoop when finding out which loops to forget, when dealing with unswitchNontrivialInvariants and unswitchTrivialSwitch. It seems to at least be needed for unswitchNontrivialInvariants as detected by the included test case. Note that unswitchTrivialBranch already used getTopMostExitingLoop. This was done in commit 4a9cde5a791cd49b96993e6. The commit message in that commit says "If the patch makes sense, I will also update those places to a similar approach ...", referring to these functions mentioned above. As far as I can tell that never happened, but this is an attempt to finally fix that. Fixes https://github.com/llvm/llvm-project/issues/61080 Differential Revision: https://reviews.llvm.org/D147058
187 lines
8.5 KiB
LLVM
187 lines
8.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
|
|
; RUN: opt < %s -passes='print<scalar-evolution>,simple-loop-unswitch<nontrivial>' -verify-scev -S | FileCheck %s
|
|
|
|
; This is a reproducer for https://github.com/llvm/llvm-project/issues/61080
|
|
;
|
|
; Note that the print<scalar-evolution> in the beginning of the pipeline is
|
|
; needed for reproducing the original problem, as we need something that
|
|
; calculate SCEV before the loop unswitch, to verify that we invalidate SCEV
|
|
; correctly while doing the unswitch.
|
|
;
|
|
; Verify that we no longer hit that assert. Also perform checks to show the IR
|
|
; transformation that is going on in this test.
|
|
|
|
|
|
define i32 @foo(i1 %not) {
|
|
; CHECK-LABEL: define i32 @foo
|
|
; CHECK-SAME: (i1 [[NOT:%.*]]) {
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[FALSE:%.*]] = and i1 true, false
|
|
; CHECK-NEXT: br i1 [[NOT]], label [[ENTRY_SPLIT_US:%.*]], label [[ENTRY_SPLIT:%.*]]
|
|
; CHECK: entry.split.us:
|
|
; CHECK-NEXT: br i1 [[FALSE]], label [[ENTRY_SPLIT_US_SPLIT_US:%.*]], label [[ENTRY_SPLIT_US_SPLIT:%.*]]
|
|
; CHECK: entry.split.us.split.us:
|
|
; CHECK-NEXT: br label [[FOR_COND_US_US:%.*]]
|
|
; CHECK: for.cond.us.us:
|
|
; CHECK-NEXT: br label [[FOR_COND_SPLIT_US_US_US:%.*]]
|
|
; CHECK: for.cond.split.us.us.us:
|
|
; CHECK-NEXT: br label [[FOR_COND_SPLIT_US_SPLIT_US_SPLIT_US_SPLIT_US:%.*]]
|
|
; CHECK: for.cond.split.us.split.us.split.us.split.us:
|
|
; CHECK-NEXT: br label [[FOR_COND_SPLIT_US_SPLIT_US_SPLIT_US:%.*]]
|
|
; CHECK: entry.split.us.split:
|
|
; CHECK-NEXT: br label [[FOR_COND_US:%.*]]
|
|
; CHECK: for.cond.us:
|
|
; CHECK-NEXT: br label [[FOR_COND_SPLIT_US_US:%.*]]
|
|
; CHECK: for.inc11.us:
|
|
; CHECK-NEXT: br label [[FOR_COND_US]]
|
|
; CHECK: for.cond.split.us.us:
|
|
; CHECK-NEXT: br label [[FOR_COND_SPLIT_US_SPLIT_US11:%.*]]
|
|
; CHECK: for.cond5.preheader.us.us9:
|
|
; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_US_US_US10:%.*]]
|
|
; CHECK: for.inc8.us.us:
|
|
; CHECK-NEXT: br i1 false, label [[FOR_INC8_FOR_COND5_PREHEADER_CRIT_EDGE_US_US:%.*]], label [[FOR_INC11_SPLIT_US_US:%.*]]
|
|
; CHECK: for.inc8.for.cond5.preheader_crit_edge.us.us:
|
|
; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_US_US9:%.*]]
|
|
; CHECK: for.end.us.us:
|
|
; CHECK-NEXT: br i1 false, label [[FOR_INC8_US_US:%.*]], label [[CLEANUP15_SPLIT_US_SPLIT_US:%.*]]
|
|
; CHECK: for.cond5.preheader.split.us.us.us10:
|
|
; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_US_SPLIT_US7_US:%.*]]
|
|
; CHECK: for.body7.us.us4.us:
|
|
; CHECK-NEXT: br label [[HANDLER_POINTER_OVERFLOW_US_US5_US:%.*]]
|
|
; CHECK: handler.pointer_overflow.us.us5.us:
|
|
; CHECK-NEXT: br label [[CONT_US_US6_US:%.*]]
|
|
; CHECK: cont.us.us6.us:
|
|
; CHECK-NEXT: br label [[FOR_END_SPLIT_US_US_US:%.*]]
|
|
; CHECK: for.end.split.us.us.us:
|
|
; CHECK-NEXT: br label [[FOR_END_US_US:%.*]]
|
|
; CHECK: for.cond5.preheader.split.us.split.us7.us:
|
|
; CHECK-NEXT: br label [[FOR_BODY7_US_US4_US:%.*]]
|
|
; CHECK: for.inc11.split.us.us:
|
|
; CHECK-NEXT: br label [[FOR_INC11_US:%.*]]
|
|
; CHECK: for.cond.split.us.split.us11:
|
|
; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_US_US9]]
|
|
; CHECK: for.cond.split.us.split.us.split.us:
|
|
; CHECK-NEXT: br label [[FOR_COND_SPLIT_US_SPLIT_US:%.*]]
|
|
; CHECK: cleanup15.split.us.split.us:
|
|
; CHECK-NEXT: br label [[CLEANUP15_SPLIT_US:%.*]]
|
|
; CHECK: entry.split:
|
|
; CHECK-NEXT: br i1 [[FALSE]], label [[ENTRY_SPLIT_SPLIT_US:%.*]], label [[ENTRY_SPLIT_SPLIT:%.*]]
|
|
; CHECK: entry.split.split.us:
|
|
; CHECK-NEXT: br label [[FOR_COND_US12:%.*]]
|
|
; CHECK: for.cond.us12:
|
|
; CHECK-NEXT: br label [[FOR_COND_SPLIT_US:%.*]]
|
|
; CHECK: for.cond.split.us:
|
|
; CHECK-NEXT: br label [[FOR_COND_SPLIT_SPLIT_US_SPLIT_US:%.*]]
|
|
; CHECK: for.cond.split.split.us.split.us:
|
|
; CHECK-NEXT: br label [[FOR_COND_SPLIT_SPLIT_US:%.*]]
|
|
; CHECK: entry.split.split:
|
|
; CHECK-NEXT: br label [[FOR_COND:%.*]]
|
|
; CHECK: for.cond:
|
|
; CHECK-NEXT: br label [[FOR_COND_SPLIT:%.*]]
|
|
; CHECK: for.cond.split.us.split.us:
|
|
; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_US_US:%.*]]
|
|
; CHECK: for.cond5.preheader.us.us:
|
|
; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_US_US_US:%.*]]
|
|
; CHECK: for.cond5.preheader.split.us.us.us:
|
|
; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_US_SPLIT_US_SPLIT_US_SPLIT_US:%.*]]
|
|
; CHECK: for.cond5.preheader.split.us.split.us.split.us.split.us:
|
|
; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_US_SPLIT_US_SPLIT_US:%.*]]
|
|
; CHECK: cleanup15.split.us:
|
|
; CHECK-NEXT: br label [[CLEANUP15:%.*]]
|
|
; CHECK: for.cond5.preheader.split.us.split.us.split.us:
|
|
; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_US_SPLIT_US:%.*]]
|
|
; CHECK: for.cond.split:
|
|
; CHECK-NEXT: br label [[FOR_COND_SPLIT_SPLIT:%.*]]
|
|
; CHECK: for.cond.split.split.us:
|
|
; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_US8:%.*]]
|
|
; CHECK: for.cond5.preheader.us8:
|
|
; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_US:%.*]]
|
|
; CHECK: for.cond5.preheader.split.us:
|
|
; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_SPLIT_US_SPLIT_US:%.*]]
|
|
; CHECK: for.cond5.preheader.split.split.us.split.us:
|
|
; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_SPLIT_US:%.*]]
|
|
; CHECK: for.cond.split.split:
|
|
; CHECK-NEXT: br label [[FOR_COND5_PREHEADER:%.*]]
|
|
; CHECK: for.cond5.preheader:
|
|
; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT:%.*]]
|
|
; CHECK: for.cond5.preheader.split.us.split.us:
|
|
; CHECK-NEXT: br label [[FOR_BODY7_US_US:%.*]]
|
|
; CHECK: for.body7.us.us:
|
|
; CHECK-NEXT: br label [[HANDLER_POINTER_OVERFLOW_US_US:%.*]]
|
|
; CHECK: handler.pointer_overflow.us.us:
|
|
; CHECK-NEXT: br label [[CONT_US_US:%.*]]
|
|
; CHECK: cont.us.us:
|
|
; CHECK-NEXT: br label [[CONT_FOR_BODY7_CRIT_EDGE_US_US:%.*]]
|
|
; CHECK: cont.for.body7_crit_edge.us.us:
|
|
; CHECK-NEXT: br label [[FOR_BODY7_US_US]]
|
|
; CHECK: for.cond5.preheader.split:
|
|
; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_SPLIT_SPLIT:%.*]]
|
|
; CHECK: for.cond5.preheader.split.split.us:
|
|
; CHECK-NEXT: br label [[FOR_BODY7_US1:%.*]]
|
|
; CHECK: for.body7.us1:
|
|
; CHECK-NEXT: br label [[CONT_US2:%.*]]
|
|
; CHECK: cont.us2:
|
|
; CHECK-NEXT: br label [[CONT_FOR_BODY7_CRIT_EDGE_US3:%.*]]
|
|
; CHECK: cont.for.body7_crit_edge.us3:
|
|
; CHECK-NEXT: br label [[FOR_BODY7_US1]]
|
|
; CHECK: for.cond5.preheader.split.split:
|
|
; CHECK-NEXT: br label [[FOR_BODY7:%.*]]
|
|
; CHECK: for.body7:
|
|
; CHECK-NEXT: br label [[CONT:%.*]]
|
|
; CHECK: cont:
|
|
; CHECK-NEXT: br label [[FOR_END_SPLIT:%.*]]
|
|
; CHECK: for.end.split:
|
|
; CHECK-NEXT: br label [[FOR_END:%.*]]
|
|
; CHECK: for.end:
|
|
; CHECK-NEXT: br i1 false, label [[FOR_INC8:%.*]], label [[CLEANUP15_SPLIT:%.*]]
|
|
; CHECK: for.inc8:
|
|
; CHECK-NEXT: br i1 false, label [[FOR_INC8_FOR_COND5_PREHEADER_CRIT_EDGE:%.*]], label [[FOR_INC11_SPLIT:%.*]]
|
|
; CHECK: for.inc8.for.cond5.preheader_crit_edge:
|
|
; CHECK-NEXT: br label [[FOR_COND5_PREHEADER]]
|
|
; CHECK: for.inc11.split:
|
|
; CHECK-NEXT: br label [[FOR_INC11:%.*]]
|
|
; CHECK: for.inc11:
|
|
; CHECK-NEXT: br label [[FOR_COND]]
|
|
; CHECK: cleanup15.split:
|
|
; CHECK-NEXT: br label [[CLEANUP15]]
|
|
; CHECK: cleanup15:
|
|
; CHECK-NEXT: ret i32 0
|
|
;
|
|
entry:
|
|
%false = and i1 1, 0
|
|
br label %for.cond
|
|
|
|
for.cond: ; preds = %for.inc11, %entry
|
|
br label %for.cond5.preheader
|
|
|
|
for.cond5.preheader: ; preds = %for.inc8.for.cond5.preheader_crit_edge, %for.cond
|
|
br label %for.body7
|
|
|
|
for.body7: ; preds = %cont.for.body7_crit_edge, %for.cond5.preheader
|
|
br i1 %not, label %handler.pointer_overflow, label %cont
|
|
|
|
handler.pointer_overflow: ; preds = %for.body7
|
|
br label %cont
|
|
|
|
cont: ; preds = %handler.pointer_overflow, %for.body7
|
|
br i1 %false, label %cont.for.body7_crit_edge, label %for.end
|
|
|
|
cont.for.body7_crit_edge: ; preds = %cont
|
|
br label %for.body7
|
|
|
|
for.end: ; preds = %cont
|
|
br i1 %false, label %for.inc8, label %cleanup15
|
|
|
|
for.inc8: ; preds = %for.end
|
|
br i1 %false, label %for.inc8.for.cond5.preheader_crit_edge, label %for.inc11
|
|
|
|
for.inc8.for.cond5.preheader_crit_edge: ; preds = %for.inc8
|
|
br label %for.cond5.preheader
|
|
|
|
for.inc11: ; preds = %for.inc8
|
|
br label %for.cond
|
|
|
|
cleanup15: ; preds = %for.end
|
|
ret i32 0
|
|
}
|