| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -S -passes=loop-unroll -unroll-runtime=true -unroll-count=16 | FileCheck --check-prefix=UNROLL-16 %s |
| ; RUN: opt < %s -S -passes=loop-unroll -unroll-runtime=true -unroll-count=4 | FileCheck --check-prefix=UNROLL-4 %s |
| |
| ; RUN: opt < %s -S -passes='require<opt-remark-emit>,loop-unroll' -unroll-runtime=true -unroll-count=16 | FileCheck --check-prefix=UNROLL-16 %s |
| ; RUN: opt < %s -S -passes='require<opt-remark-emit>,loop-unroll' -unroll-runtime=true -unroll-count=4 | FileCheck --check-prefix=UNROLL-4 %s |
| |
| ; Given that the trip-count of this loop is a 3-bit value, we cannot |
| ; safely unroll it with a count of anything more than 8. |
| |
| define i3 @test(ptr %a, i3 %n) { |
| ; UNROLL-16-LABEL: @test( |
| ; UNROLL-16-NEXT: entry: |
| ; UNROLL-16-NEXT: [[CMP1:%.*]] = icmp eq i3 [[N:%.*]], 0 |
| ; UNROLL-16-NEXT: br i1 [[CMP1]], label [[FOR_END:%.*]], label [[FOR_BODY_PREHEADER:%.*]] |
| ; UNROLL-16: for.body.preheader: |
| ; UNROLL-16-NEXT: br label [[FOR_BODY:%.*]] |
| ; UNROLL-16: for.body: |
| ; UNROLL-16-NEXT: [[TMP0:%.*]] = load i3, ptr [[A:%.*]], align 1 |
| ; UNROLL-16-NEXT: [[EXITCOND:%.*]] = icmp eq i3 1, [[N]] |
| ; UNROLL-16-NEXT: br i1 [[EXITCOND]], label [[FOR_END_LOOPEXIT:%.*]], label [[FOR_BODY_1:%.*]] |
| ; UNROLL-16: for.body.1: |
| ; UNROLL-16-NEXT: [[ARRAYIDX_1:%.*]] = getelementptr inbounds i3, ptr [[A]], i64 1 |
| ; UNROLL-16-NEXT: [[TMP1:%.*]] = load i3, ptr [[ARRAYIDX_1]], align 1 |
| ; UNROLL-16-NEXT: [[ADD_1:%.*]] = add nsw i3 [[TMP1]], [[TMP0]] |
| ; UNROLL-16-NEXT: [[EXITCOND_1:%.*]] = icmp eq i3 2, [[N]] |
| ; UNROLL-16-NEXT: br i1 [[EXITCOND_1]], label [[FOR_END_LOOPEXIT]], label [[FOR_BODY_2:%.*]] |
| ; UNROLL-16: for.body.2: |
| ; UNROLL-16-NEXT: [[ARRAYIDX_2:%.*]] = getelementptr inbounds i3, ptr [[A]], i64 2 |
| ; UNROLL-16-NEXT: [[TMP2:%.*]] = load i3, ptr [[ARRAYIDX_2]], align 1 |
| ; UNROLL-16-NEXT: [[ADD_2:%.*]] = add nsw i3 [[TMP2]], [[ADD_1]] |
| ; UNROLL-16-NEXT: [[EXITCOND_2:%.*]] = icmp eq i3 3, [[N]] |
| ; UNROLL-16-NEXT: br i1 [[EXITCOND_2]], label [[FOR_END_LOOPEXIT]], label [[FOR_BODY_3:%.*]] |
| ; UNROLL-16: for.body.3: |
| ; UNROLL-16-NEXT: [[ARRAYIDX_3:%.*]] = getelementptr inbounds i3, ptr [[A]], i64 3 |
| ; UNROLL-16-NEXT: [[TMP3:%.*]] = load i3, ptr [[ARRAYIDX_3]], align 1 |
| ; UNROLL-16-NEXT: [[ADD_3:%.*]] = add nsw i3 [[TMP3]], [[ADD_2]] |
| ; UNROLL-16-NEXT: [[EXITCOND_3:%.*]] = icmp eq i3 -4, [[N]] |
| ; UNROLL-16-NEXT: br i1 [[EXITCOND_3]], label [[FOR_END_LOOPEXIT]], label [[FOR_BODY_4:%.*]] |
| ; UNROLL-16: for.body.4: |
| ; UNROLL-16-NEXT: [[ARRAYIDX_4:%.*]] = getelementptr inbounds i3, ptr [[A]], i64 4 |
| ; UNROLL-16-NEXT: [[TMP4:%.*]] = load i3, ptr [[ARRAYIDX_4]], align 1 |
| ; UNROLL-16-NEXT: [[ADD_4:%.*]] = add nsw i3 [[TMP4]], [[ADD_3]] |
| ; UNROLL-16-NEXT: [[EXITCOND_4:%.*]] = icmp eq i3 -3, [[N]] |
| ; UNROLL-16-NEXT: br i1 [[EXITCOND_4]], label [[FOR_END_LOOPEXIT]], label [[FOR_BODY_5:%.*]] |
| ; UNROLL-16: for.body.5: |
| ; UNROLL-16-NEXT: [[ARRAYIDX_5:%.*]] = getelementptr inbounds i3, ptr [[A]], i64 5 |
| ; UNROLL-16-NEXT: [[TMP5:%.*]] = load i3, ptr [[ARRAYIDX_5]], align 1 |
| ; UNROLL-16-NEXT: [[ADD_5:%.*]] = add nsw i3 [[TMP5]], [[ADD_4]] |
| ; UNROLL-16-NEXT: [[EXITCOND_5:%.*]] = icmp eq i3 -2, [[N]] |
| ; UNROLL-16-NEXT: br i1 [[EXITCOND_5]], label [[FOR_END_LOOPEXIT]], label [[FOR_BODY_6:%.*]] |
| ; UNROLL-16: for.body.6: |
| ; UNROLL-16-NEXT: [[ARRAYIDX_6:%.*]] = getelementptr inbounds i3, ptr [[A]], i64 6 |
| ; UNROLL-16-NEXT: [[TMP6:%.*]] = load i3, ptr [[ARRAYIDX_6]], align 1 |
| ; UNROLL-16-NEXT: [[ADD_6:%.*]] = add nsw i3 [[TMP6]], [[ADD_5]] |
| ; UNROLL-16-NEXT: br label [[FOR_END_LOOPEXIT]] |
| ; UNROLL-16: for.end.loopexit: |
| ; UNROLL-16-NEXT: [[ADD_LCSSA:%.*]] = phi i3 [ [[TMP0]], [[FOR_BODY]] ], [ [[ADD_1]], [[FOR_BODY_1]] ], [ [[ADD_2]], [[FOR_BODY_2]] ], [ [[ADD_3]], [[FOR_BODY_3]] ], [ [[ADD_4]], [[FOR_BODY_4]] ], [ [[ADD_5]], [[FOR_BODY_5]] ], [ [[ADD_6]], [[FOR_BODY_6]] ] |
| ; UNROLL-16-NEXT: br label [[FOR_END]] |
| ; UNROLL-16: for.end: |
| ; UNROLL-16-NEXT: [[SUM_0_LCSSA:%.*]] = phi i3 [ 0, [[ENTRY:%.*]] ], [ [[ADD_LCSSA]], [[FOR_END_LOOPEXIT]] ] |
| ; UNROLL-16-NEXT: ret i3 [[SUM_0_LCSSA]] |
| ; |
| ; UNROLL-4-LABEL: @test( |
| ; UNROLL-4-NEXT: entry: |
| ; UNROLL-4-NEXT: [[CMP1:%.*]] = icmp eq i3 [[N:%.*]], 0 |
| ; UNROLL-4-NEXT: br i1 [[CMP1]], label [[FOR_END:%.*]], label [[FOR_BODY_PREHEADER:%.*]] |
| ; UNROLL-4: for.body.preheader: |
| ; UNROLL-4-NEXT: [[TMP0:%.*]] = add i3 [[N]], -1 |
| ; UNROLL-4-NEXT: [[XTRAITER:%.*]] = and i3 [[N]], 3 |
| ; UNROLL-4-NEXT: [[TMP1:%.*]] = icmp ult i3 [[TMP0]], 3 |
| ; UNROLL-4-NEXT: br i1 [[TMP1]], label [[FOR_END_LOOPEXIT_UNR_LCSSA:%.*]], label [[FOR_BODY_PREHEADER_NEW:%.*]] |
| ; UNROLL-4: for.body.preheader.new: |
| ; UNROLL-4-NEXT: [[UNROLL_ITER:%.*]] = sub i3 [[N]], [[XTRAITER]] |
| ; UNROLL-4-NEXT: br label [[FOR_BODY:%.*]] |
| ; UNROLL-4: for.body: |
| ; UNROLL-4-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, [[FOR_BODY_PREHEADER_NEW]] ], [ [[INDVARS_IV_NEXT_3:%.*]], [[FOR_BODY]] ] |
| ; UNROLL-4-NEXT: [[SUM_02:%.*]] = phi i3 [ 0, [[FOR_BODY_PREHEADER_NEW]] ], [ [[ADD_3:%.*]], [[FOR_BODY]] ] |
| ; UNROLL-4-NEXT: [[NITER:%.*]] = phi i3 [ 0, [[FOR_BODY_PREHEADER_NEW]] ], [ [[NITER_NEXT_3:%.*]], [[FOR_BODY]] ] |
| ; UNROLL-4-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i3, ptr [[A:%.*]], i64 [[INDVARS_IV]] |
| ; UNROLL-4-NEXT: [[TMP2:%.*]] = load i3, ptr [[ARRAYIDX]], align 1 |
| ; UNROLL-4-NEXT: [[ADD:%.*]] = add nsw i3 [[TMP2]], [[SUM_02]] |
| ; UNROLL-4-NEXT: [[INDVARS_IV_NEXT:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 1 |
| ; UNROLL-4-NEXT: [[ARRAYIDX_1:%.*]] = getelementptr inbounds i3, ptr [[A]], i64 [[INDVARS_IV_NEXT]] |
| ; UNROLL-4-NEXT: [[TMP3:%.*]] = load i3, ptr [[ARRAYIDX_1]], align 1 |
| ; UNROLL-4-NEXT: [[ADD_1:%.*]] = add nsw i3 [[TMP3]], [[ADD]] |
| ; UNROLL-4-NEXT: [[INDVARS_IV_NEXT_1:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 2 |
| ; UNROLL-4-NEXT: [[ARRAYIDX_2:%.*]] = getelementptr inbounds i3, ptr [[A]], i64 [[INDVARS_IV_NEXT_1]] |
| ; UNROLL-4-NEXT: [[TMP4:%.*]] = load i3, ptr [[ARRAYIDX_2]], align 1 |
| ; UNROLL-4-NEXT: [[ADD_2:%.*]] = add nsw i3 [[TMP4]], [[ADD_1]] |
| ; UNROLL-4-NEXT: [[INDVARS_IV_NEXT_2:%.*]] = add nuw nsw i64 [[INDVARS_IV]], 3 |
| ; UNROLL-4-NEXT: [[ARRAYIDX_3:%.*]] = getelementptr inbounds i3, ptr [[A]], i64 [[INDVARS_IV_NEXT_2]] |
| ; UNROLL-4-NEXT: [[TMP5:%.*]] = load i3, ptr [[ARRAYIDX_3]], align 1 |
| ; UNROLL-4-NEXT: [[ADD_3]] = add nsw i3 [[TMP5]], [[ADD_2]] |
| ; UNROLL-4-NEXT: [[INDVARS_IV_NEXT_3]] = add nuw nsw i64 [[INDVARS_IV]], 4 |
| ; UNROLL-4-NEXT: [[NITER_NEXT_3]] = add i3 [[NITER]], -4 |
| ; UNROLL-4-NEXT: [[NITER_NCMP_3:%.*]] = icmp eq i3 [[NITER_NEXT_3]], [[UNROLL_ITER]] |
| ; UNROLL-4-NEXT: br i1 [[NITER_NCMP_3]], label [[FOR_END_LOOPEXIT_UNR_LCSSA_LOOPEXIT:%.*]], label [[FOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]] |
| ; UNROLL-4: for.end.loopexit.unr-lcssa.loopexit: |
| ; UNROLL-4-NEXT: [[ADD_LCSSA_PH_PH:%.*]] = phi i3 [ [[ADD_3]], [[FOR_BODY]] ] |
| ; UNROLL-4-NEXT: [[INDVARS_IV_UNR_PH:%.*]] = phi i64 [ [[INDVARS_IV_NEXT_3]], [[FOR_BODY]] ] |
| ; UNROLL-4-NEXT: [[SUM_02_UNR_PH:%.*]] = phi i3 [ [[ADD_3]], [[FOR_BODY]] ] |
| ; UNROLL-4-NEXT: br label [[FOR_END_LOOPEXIT_UNR_LCSSA]] |
| ; UNROLL-4: for.end.loopexit.unr-lcssa: |
| ; UNROLL-4-NEXT: [[ADD_LCSSA_PH:%.*]] = phi i3 [ undef, [[FOR_BODY_PREHEADER]] ], [ [[ADD_LCSSA_PH_PH]], [[FOR_END_LOOPEXIT_UNR_LCSSA_LOOPEXIT]] ] |
| ; UNROLL-4-NEXT: [[INDVARS_IV_UNR:%.*]] = phi i64 [ 0, [[FOR_BODY_PREHEADER]] ], [ [[INDVARS_IV_UNR_PH]], [[FOR_END_LOOPEXIT_UNR_LCSSA_LOOPEXIT]] ] |
| ; UNROLL-4-NEXT: [[SUM_02_UNR:%.*]] = phi i3 [ 0, [[FOR_BODY_PREHEADER]] ], [ [[SUM_02_UNR_PH]], [[FOR_END_LOOPEXIT_UNR_LCSSA_LOOPEXIT]] ] |
| ; UNROLL-4-NEXT: [[LCMP_MOD:%.*]] = icmp ne i3 [[XTRAITER]], 0 |
| ; UNROLL-4-NEXT: br i1 [[LCMP_MOD]], label [[FOR_BODY_EPIL_PREHEADER:%.*]], label [[FOR_END_LOOPEXIT:%.*]] |
| ; UNROLL-4: for.body.epil.preheader: |
| ; UNROLL-4-NEXT: br label [[FOR_BODY_EPIL:%.*]] |
| ; UNROLL-4: for.body.epil: |
| ; UNROLL-4-NEXT: [[INDVARS_IV_EPIL:%.*]] = phi i64 [ [[INDVARS_IV_NEXT_EPIL:%.*]], [[FOR_BODY_EPIL]] ], [ [[INDVARS_IV_UNR]], [[FOR_BODY_EPIL_PREHEADER]] ] |
| ; UNROLL-4-NEXT: [[SUM_02_EPIL:%.*]] = phi i3 [ [[ADD_EPIL:%.*]], [[FOR_BODY_EPIL]] ], [ [[SUM_02_UNR]], [[FOR_BODY_EPIL_PREHEADER]] ] |
| ; UNROLL-4-NEXT: [[EPIL_ITER:%.*]] = phi i3 [ 0, [[FOR_BODY_EPIL_PREHEADER]] ], [ [[EPIL_ITER_NEXT:%.*]], [[FOR_BODY_EPIL]] ] |
| ; UNROLL-4-NEXT: [[ARRAYIDX_EPIL:%.*]] = getelementptr inbounds i3, ptr [[A]], i64 [[INDVARS_IV_EPIL]] |
| ; UNROLL-4-NEXT: [[TMP6:%.*]] = load i3, ptr [[ARRAYIDX_EPIL]], align 1 |
| ; UNROLL-4-NEXT: [[ADD_EPIL]] = add nsw i3 [[TMP6]], [[SUM_02_EPIL]] |
| ; UNROLL-4-NEXT: [[INDVARS_IV_NEXT_EPIL]] = add i64 [[INDVARS_IV_EPIL]], 1 |
| ; UNROLL-4-NEXT: [[LFTR_WIDEIV_EPIL:%.*]] = trunc i64 [[INDVARS_IV_NEXT_EPIL]] to i3 |
| ; UNROLL-4-NEXT: [[EXITCOND_EPIL:%.*]] = icmp eq i3 [[LFTR_WIDEIV_EPIL]], [[N]] |
| ; UNROLL-4-NEXT: [[EPIL_ITER_NEXT]] = add i3 [[EPIL_ITER]], 1 |
| ; UNROLL-4-NEXT: [[EPIL_ITER_CMP:%.*]] = icmp ne i3 [[EPIL_ITER_NEXT]], [[XTRAITER]] |
| ; UNROLL-4-NEXT: br i1 [[EPIL_ITER_CMP]], label [[FOR_BODY_EPIL]], label [[FOR_END_LOOPEXIT_EPILOG_LCSSA:%.*]], !llvm.loop [[LOOP2:![0-9]+]] |
| ; UNROLL-4: for.end.loopexit.epilog-lcssa: |
| ; UNROLL-4-NEXT: [[ADD_LCSSA_PH1:%.*]] = phi i3 [ [[ADD_EPIL]], [[FOR_BODY_EPIL]] ] |
| ; UNROLL-4-NEXT: br label [[FOR_END_LOOPEXIT]] |
| ; UNROLL-4: for.end.loopexit: |
| ; UNROLL-4-NEXT: [[ADD_LCSSA:%.*]] = phi i3 [ [[ADD_LCSSA_PH]], [[FOR_END_LOOPEXIT_UNR_LCSSA]] ], [ [[ADD_LCSSA_PH1]], [[FOR_END_LOOPEXIT_EPILOG_LCSSA]] ] |
| ; UNROLL-4-NEXT: br label [[FOR_END]] |
| ; UNROLL-4: for.end: |
| ; UNROLL-4-NEXT: [[SUM_0_LCSSA:%.*]] = phi i3 [ 0, [[ENTRY:%.*]] ], [ [[ADD_LCSSA]], [[FOR_END_LOOPEXIT]] ] |
| ; UNROLL-4-NEXT: ret i3 [[SUM_0_LCSSA]] |
| ; |
| entry: |
| %cmp1 = icmp eq i3 %n, 0 |
| br i1 %cmp1, label %for.end, label %for.body |
| |
| for.body: ; preds = %for.body, %entry |
| %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ] |
| %sum.02 = phi i3 [ %add, %for.body ], [ 0, %entry ] |
| %arrayidx = getelementptr inbounds i3, ptr %a, i64 %indvars.iv |
| %0 = load i3, ptr %arrayidx |
| %add = add nsw i3 %0, %sum.02 |
| %indvars.iv.next = add i64 %indvars.iv, 1 |
| %lftr.wideiv = trunc i64 %indvars.iv.next to i3 |
| %exitcond = icmp eq i3 %lftr.wideiv, %n |
| br i1 %exitcond, label %for.end, label %for.body |
| |
| for.end: ; preds = %for.body, %entry |
| %sum.0.lcssa = phi i3 [ 0, %entry ], [ %add, %for.body ] |
| ret i3 %sum.0.lcssa |
| } |
