1db2551cc1
It is confusing to have two ways of specifying the same pass
('simple-loop-unswitch' and 'unswitch'). This patch replaces
'unswitch' by 'simple-loop-unswitch' to get a unique identifier.
Using 'simple-loop-unswitch' instead of 'unswitch' also has the
advantage of matching how the pass is named in DEBUG_TYPE etc. So
this makes it a bit more consistent how we refer to the pass in
options such as -passes, -print-after and -debug-only.
Reviewed By: aeubanks
Differential Revision: https://reviews.llvm.org/D105628
109 lines
4.5 KiB
LLVM
109 lines
4.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt -passes='loop-mssa(simple-loop-unswitch<nontrivial>),loop-mssa(simple-loop-unswitch<nontrivial>),verify<loops>' -S < %s | FileCheck %s
|
|
|
|
; Below bugs have caused endless unswitch.
|
|
;
|
|
; https://bugs.llvm.org/show_bug.cgi?id=50279
|
|
; https://bugs.llvm.org/show_bug.cgi?id=50302
|
|
;
|
|
; This test's loop should be unswitched only one time even though we run
|
|
; SimpleLoopUnswitch pass two times.
|
|
|
|
@a = dso_local local_unnamed_addr global i32 0, align 4
|
|
@c = dso_local local_unnamed_addr global i32 0, align 4
|
|
@b = dso_local local_unnamed_addr global i8 0, align 1
|
|
|
|
; Function Attrs: nofree norecurse nosync nounwind uwtable
|
|
define dso_local void @d() {
|
|
; CHECK-LABEL: @d(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br label [[FOR_COND:%.*]]
|
|
; CHECK: for.cond:
|
|
; CHECK-NEXT: br i1 false, label [[FOR_END:%.*]], label [[FOR_COND]]
|
|
; CHECK: for.end:
|
|
; CHECK-NEXT: [[TMP0:%.*]] = load i16, i16* null, align 2
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i16 [[TMP0]], 0
|
|
; CHECK-NEXT: br i1 [[TMP1]], label [[FOR_END_SPLIT:%.*]], label [[FOR_END_SPLIT_US:%.*]]
|
|
; CHECK: for.end.split.us:
|
|
; CHECK-NEXT: br label [[G_US:%.*]]
|
|
; CHECK: g.us:
|
|
; CHECK-NEXT: br label [[G_SPLIT_US6:%.*]]
|
|
; CHECK: for.cond1.us1:
|
|
; CHECK-NEXT: [[TMP2:%.*]] = load i16, i16* null, align 2
|
|
; CHECK-NEXT: [[TOBOOL4_NOT_US:%.*]] = icmp eq i16 [[TMP2]], 0
|
|
; CHECK-NEXT: br i1 [[TOBOOL4_NOT_US]], label [[FOR_COND5_PREHEADER_US4:%.*]], label [[G_LOOPEXIT_US:%.*]]
|
|
; CHECK: for.cond5.us2:
|
|
; CHECK-NEXT: br i1 false, label [[FOR_COND1_LOOPEXIT_US5:%.*]], label [[FOR_INC_US3:%.*]]
|
|
; CHECK: for.inc.us3:
|
|
; CHECK-NEXT: store i8 0, i8* @b, align 1
|
|
; CHECK-NEXT: br label [[FOR_COND5_US2:%.*]]
|
|
; CHECK: for.cond5.preheader.us4:
|
|
; CHECK-NEXT: br label [[FOR_COND5_US2]]
|
|
; CHECK: for.cond1.loopexit.us5:
|
|
; CHECK-NEXT: br label [[FOR_COND1_US1:%.*]], !llvm.loop [[LOOP0:![0-9]+]]
|
|
; CHECK: g.loopexit.us:
|
|
; CHECK-NEXT: br label [[G_US]]
|
|
; CHECK: g.split.us6:
|
|
; CHECK-NEXT: br label [[FOR_COND1_US1]]
|
|
; CHECK: for.end.split:
|
|
; CHECK-NEXT: br label [[G:%.*]]
|
|
; CHECK: g.loopexit:
|
|
; CHECK-NEXT: br label [[G]], !llvm.loop [[LOOP2:![0-9]+]]
|
|
; CHECK: g:
|
|
; CHECK-NEXT: [[TMP3:%.*]] = load i16, i16* null, align 2
|
|
; CHECK-NEXT: [[TMP4:%.*]] = icmp eq i16 [[TMP3]], 0
|
|
; CHECK-NEXT: br i1 [[TMP4]], label [[G_SPLIT_US:%.*]], label [[G_SPLIT:%.*]]
|
|
; CHECK: g.split.us:
|
|
; CHECK-NEXT: br label [[FOR_COND1_US:%.*]]
|
|
; CHECK: for.cond1.us:
|
|
; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_US:%.*]]
|
|
; CHECK: for.cond5.us:
|
|
; CHECK-NEXT: br i1 false, label [[FOR_COND1_LOOPEXIT_US:%.*]], label [[FOR_INC_US:%.*]]
|
|
; CHECK: for.inc.us:
|
|
; CHECK-NEXT: store i8 0, i8* @b, align 1
|
|
; CHECK-NEXT: br label [[FOR_COND5_US:%.*]]
|
|
; CHECK: for.cond5.preheader.us:
|
|
; CHECK-NEXT: br label [[FOR_COND5_US]]
|
|
; CHECK: for.cond1.loopexit.us:
|
|
; CHECK-NEXT: br label [[FOR_COND1_US]]
|
|
; CHECK: g.split:
|
|
; CHECK-NEXT: br label [[FOR_COND1:%.*]]
|
|
; CHECK: for.cond1.loopexit:
|
|
; CHECK-NEXT: br label [[FOR_COND1]], !llvm.loop [[LOOP0]]
|
|
; CHECK: for.cond1:
|
|
; CHECK-NEXT: [[TMP5:%.*]] = load i16, i16* null, align 2
|
|
; CHECK-NEXT: [[TOBOOL4_NOT:%.*]] = icmp eq i16 [[TMP5]], 0
|
|
; CHECK-NEXT: br i1 [[TOBOOL4_NOT]], label [[FOR_COND5_PREHEADER:%.*]], label [[G_LOOPEXIT:%.*]]
|
|
; CHECK: for.cond5.preheader:
|
|
; CHECK-NEXT: br label [[FOR_COND5:%.*]]
|
|
; CHECK: for.cond5:
|
|
; CHECK-NEXT: br i1 false, label [[FOR_COND1_LOOPEXIT:%.*]], label [[FOR_INC:%.*]]
|
|
; CHECK: for.inc:
|
|
; CHECK-NEXT: store i8 0, i8* @b, align 1
|
|
; CHECK-NEXT: br label [[FOR_COND5]]
|
|
;
|
|
entry:
|
|
br label %for.cond
|
|
|
|
for.cond: ; preds = %for.cond, %entry
|
|
br i1 false, label %for.end, label %for.cond
|
|
|
|
for.end: ; preds = %for.cond
|
|
br label %g
|
|
|
|
g: ; preds = %for.cond1, %for.end
|
|
br label %for.cond1
|
|
|
|
for.cond1: ; preds = %for.cond5, %g
|
|
%0 = load i16, i16* null, align 2
|
|
%tobool4.not = icmp eq i16 %0, 0
|
|
br i1 %tobool4.not, label %for.cond5, label %g
|
|
|
|
for.cond5: ; preds = %for.inc, %for.cond1
|
|
br i1 false, label %for.cond1, label %for.inc
|
|
|
|
for.inc: ; preds = %for.cond5
|
|
store i8 0, i8* @b, align 1
|
|
br label %for.cond5
|
|
}
|