forked from OSchip/llvm-project
109 lines
4.5 KiB
LLVM
109 lines
4.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes='loop-mssa(simple-loop-unswitch<nontrivial>),loop-mssa(simple-loop-unswitch<nontrivial>),verify<loops>' -S < %s | FileCheck %s
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; Below bugs have caused endless unswitch.
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;
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; https://bugs.llvm.org/show_bug.cgi?id=50279
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; https://bugs.llvm.org/show_bug.cgi?id=50302
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;
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; This test's loop should be unswitched only one time even though we run
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; SimpleLoopUnswitch pass two times.
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@a = dso_local local_unnamed_addr global i32 0, align 4
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@c = dso_local local_unnamed_addr global i32 0, align 4
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@b = dso_local local_unnamed_addr global i8 0, align 1
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; Function Attrs: nofree norecurse nosync nounwind uwtable
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define dso_local void @d() {
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; CHECK-LABEL: @d(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[FOR_COND:%.*]]
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; CHECK: for.cond:
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; CHECK-NEXT: br i1 false, label [[FOR_END:%.*]], label [[FOR_COND]]
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; CHECK: for.end:
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; CHECK-NEXT: [[TMP0:%.*]] = load i16, i16* null, align 2
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; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i16 [[TMP0]], 0
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; CHECK-NEXT: br i1 [[TMP1]], label [[FOR_END_SPLIT:%.*]], label [[FOR_END_SPLIT_US:%.*]]
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; CHECK: for.end.split.us:
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; CHECK-NEXT: br label [[G_US:%.*]]
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; CHECK: g.us:
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; CHECK-NEXT: br label [[G_SPLIT_US6:%.*]]
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; CHECK: for.cond1.us1:
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; CHECK-NEXT: [[TMP2:%.*]] = load i16, i16* null, align 2
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; CHECK-NEXT: [[TOBOOL4_NOT_US:%.*]] = icmp eq i16 [[TMP2]], 0
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; CHECK-NEXT: br i1 [[TOBOOL4_NOT_US]], label [[FOR_COND5_PREHEADER_US4:%.*]], label [[G_LOOPEXIT_US:%.*]]
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; CHECK: for.cond5.us2:
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; CHECK-NEXT: br i1 false, label [[FOR_COND1_LOOPEXIT_US5:%.*]], label [[FOR_INC_US3:%.*]]
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; CHECK: for.inc.us3:
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; CHECK-NEXT: store i8 0, i8* @b, align 1
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; CHECK-NEXT: br label [[FOR_COND5_US2:%.*]]
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; CHECK: for.cond5.preheader.us4:
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; CHECK-NEXT: br label [[FOR_COND5_US2]]
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; CHECK: for.cond1.loopexit.us5:
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; CHECK-NEXT: br label [[FOR_COND1_US1:%.*]], !llvm.loop [[LOOP0:![0-9]+]]
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; CHECK: g.loopexit.us:
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; CHECK-NEXT: br label [[G_US]]
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; CHECK: g.split.us6:
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; CHECK-NEXT: br label [[FOR_COND1_US1]]
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; CHECK: for.end.split:
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; CHECK-NEXT: br label [[G:%.*]]
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; CHECK: g.loopexit:
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; CHECK-NEXT: br label [[G]], !llvm.loop [[LOOP2:![0-9]+]]
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; CHECK: g:
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; CHECK-NEXT: [[TMP3:%.*]] = load i16, i16* null, align 2
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; CHECK-NEXT: [[TMP4:%.*]] = icmp eq i16 [[TMP3]], 0
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; CHECK-NEXT: br i1 [[TMP4]], label [[G_SPLIT_US:%.*]], label [[G_SPLIT:%.*]]
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; CHECK: g.split.us:
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; CHECK-NEXT: br label [[FOR_COND1_US:%.*]]
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; CHECK: for.cond1.us:
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; CHECK-NEXT: br label [[FOR_COND5_PREHEADER_US:%.*]]
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; CHECK: for.cond5.us:
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; CHECK-NEXT: br i1 false, label [[FOR_COND1_LOOPEXIT_US:%.*]], label [[FOR_INC_US:%.*]]
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; CHECK: for.inc.us:
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; CHECK-NEXT: store i8 0, i8* @b, align 1
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; CHECK-NEXT: br label [[FOR_COND5_US:%.*]]
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; CHECK: for.cond5.preheader.us:
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; CHECK-NEXT: br label [[FOR_COND5_US]]
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; CHECK: for.cond1.loopexit.us:
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; CHECK-NEXT: br label [[FOR_COND1_US]]
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; CHECK: g.split:
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; CHECK-NEXT: br label [[FOR_COND1:%.*]]
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; CHECK: for.cond1.loopexit:
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; CHECK-NEXT: br label [[FOR_COND1]], !llvm.loop [[LOOP0]]
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; CHECK: for.cond1:
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; CHECK-NEXT: [[TMP5:%.*]] = load i16, i16* null, align 2
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; CHECK-NEXT: [[TOBOOL4_NOT:%.*]] = icmp eq i16 [[TMP5]], 0
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; CHECK-NEXT: br i1 [[TOBOOL4_NOT]], label [[FOR_COND5_PREHEADER:%.*]], label [[G_LOOPEXIT:%.*]]
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; CHECK: for.cond5.preheader:
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; CHECK-NEXT: br label [[FOR_COND5:%.*]]
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; CHECK: for.cond5:
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; CHECK-NEXT: br i1 false, label [[FOR_COND1_LOOPEXIT:%.*]], label [[FOR_INC:%.*]]
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; CHECK: for.inc:
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; CHECK-NEXT: store i8 0, i8* @b, align 1
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; CHECK-NEXT: br label [[FOR_COND5]]
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;
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entry:
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br label %for.cond
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for.cond: ; preds = %for.cond, %entry
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br i1 false, label %for.end, label %for.cond
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for.end: ; preds = %for.cond
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br label %g
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g: ; preds = %for.cond1, %for.end
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br label %for.cond1
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for.cond1: ; preds = %for.cond5, %g
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%0 = load i16, i16* null, align 2
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%tobool4.not = icmp eq i16 %0, 0
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br i1 %tobool4.not, label %for.cond5, label %g
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for.cond5: ; preds = %for.inc, %for.cond1
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br i1 false, label %for.cond1, label %for.inc
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for.inc: ; preds = %for.cond5
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store i8 0, i8* @b, align 1
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br label %for.cond5
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}
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