1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt %s -S -riscv-codegenprepare -mtriple=riscv64 | FileCheck %s 3 4; Make sure we convert the 4294967294 in for.body.preheader.new to -2 based on 5; the upper 33 bits being zero by the dominating condition %cmp3. 6define void @test2(ptr nocapture noundef %a, i32 noundef signext %n) { 7; CHECK-LABEL: @test2( 8; CHECK-NEXT: entry: 9; CHECK-NEXT: [[CMP3:%.*]] = icmp sgt i32 [[N:%.*]], 0 10; CHECK-NEXT: br i1 [[CMP3]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_COND_CLEANUP:%.*]] 11; CHECK: for.body.preheader: 12; CHECK-NEXT: [[WIDE_TRIP_COUNT:%.*]] = zext nneg i32 [[N]] to i64 13; CHECK-NEXT: [[XTRAITER:%.*]] = and i64 [[WIDE_TRIP_COUNT]], 1 14; CHECK-NEXT: [[TMP0:%.*]] = icmp eq i32 [[N]], 1 15; CHECK-NEXT: br i1 [[TMP0]], label [[FOR_COND_CLEANUP_LOOPEXIT_UNR_LCSSA:%.*]], label [[FOR_BODY_PREHEADER_NEW:%.*]] 16; CHECK: for.body.preheader.new: 17; CHECK-NEXT: [[UNROLL_ITER:%.*]] = and i64 [[WIDE_TRIP_COUNT]], -2 18; CHECK-NEXT: br label [[FOR_BODY:%.*]] 19; CHECK: for.cond.cleanup.loopexit.unr-lcssa: 20; CHECK-NEXT: [[INDVARS_IV_UNR:%.*]] = phi i64 [ 0, [[FOR_BODY_PREHEADER]] ], [ [[INDVARS_IV_NEXT_1:%.*]], [[FOR_BODY]] ] 21; CHECK-NEXT: [[LCMP_MOD_NOT:%.*]] = icmp eq i64 [[XTRAITER]], 0 22; CHECK-NEXT: br i1 [[LCMP_MOD_NOT]], label [[FOR_COND_CLEANUP]], label [[FOR_BODY_EPIL:%.*]] 23; CHECK: for.body.epil: 24; CHECK-NEXT: [[ARRAYIDX_EPIL:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i64 [[INDVARS_IV_UNR]] 25; CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[ARRAYIDX_EPIL]], align 4 26; CHECK-NEXT: [[ADD_EPIL:%.*]] = add nsw i32 [[TMP1]], 4 27; CHECK-NEXT: store i32 [[ADD_EPIL]], ptr [[ARRAYIDX_EPIL]], align 4 28; CHECK-NEXT: br label [[FOR_COND_CLEANUP]] 29; CHECK: for.cond.cleanup: 30; CHECK-NEXT: ret void 31; CHECK: for.body: 32; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, [[FOR_BODY_PREHEADER_NEW]] ], [ [[INDVARS_IV_NEXT_1]], [[FOR_BODY]] ] 33; CHECK-NEXT: [[NITER:%.*]] = phi i64 [ 0, [[FOR_BODY_PREHEADER_NEW]] ], [ [[NITER_NEXT_1:%.*]], [[FOR_BODY]] ] 34; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDVARS_IV]] 35; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[ARRAYIDX]], align 4 36; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[TMP2]], 4 37; CHECK-NEXT: store i32 [[ADD]], ptr [[ARRAYIDX]], align 4 38; CHECK-NEXT: [[INDVARS_IV_NEXT:%.*]] = or i64 [[INDVARS_IV]], 1 39; CHECK-NEXT: [[ARRAYIDX_1:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[INDVARS_IV_NEXT]] 40; CHECK-NEXT: [[TMP3:%.*]] = load i32, ptr [[ARRAYIDX_1]], align 4 41; CHECK-NEXT: [[ADD_1:%.*]] = add nsw i32 [[TMP3]], 4 42; CHECK-NEXT: store i32 [[ADD_1]], ptr [[ARRAYIDX_1]], align 4 43; CHECK-NEXT: [[INDVARS_IV_NEXT_1]] = add nuw nsw i64 [[INDVARS_IV]], 2 44; CHECK-NEXT: [[NITER_NEXT_1]] = add i64 [[NITER]], 2 45; CHECK-NEXT: [[NITER_NCMP_1:%.*]] = icmp eq i64 [[NITER_NEXT_1]], [[UNROLL_ITER]] 46; CHECK-NEXT: br i1 [[NITER_NCMP_1]], label [[FOR_COND_CLEANUP_LOOPEXIT_UNR_LCSSA]], label [[FOR_BODY]] 47; 48entry: 49 %cmp3 = icmp sgt i32 %n, 0 50 br i1 %cmp3, label %for.body.preheader, label %for.cond.cleanup 51 52for.body.preheader: ; preds = %entry 53 %wide.trip.count = zext nneg i32 %n to i64 54 %xtraiter = and i64 %wide.trip.count, 1 55 %0 = icmp eq i32 %n, 1 56 br i1 %0, label %for.cond.cleanup.loopexit.unr-lcssa, label %for.body.preheader.new 57 58for.body.preheader.new: ; preds = %for.body.preheader 59 %unroll_iter = and i64 %wide.trip.count, 4294967294 60 br label %for.body 61 62for.cond.cleanup.loopexit.unr-lcssa: ; preds = %for.body, %for.body.preheader 63 %indvars.iv.unr = phi i64 [ 0, %for.body.preheader ], [ %indvars.iv.next.1, %for.body ] 64 %lcmp.mod.not = icmp eq i64 %xtraiter, 0 65 br i1 %lcmp.mod.not, label %for.cond.cleanup, label %for.body.epil 66 67for.body.epil: ; preds = %for.cond.cleanup.loopexit.unr-lcssa 68 %arrayidx.epil = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.unr 69 %1 = load i32, ptr %arrayidx.epil, align 4 70 %add.epil = add nsw i32 %1, 4 71 store i32 %add.epil, ptr %arrayidx.epil, align 4 72 br label %for.cond.cleanup 73 74for.cond.cleanup: ; preds = %for.body.epil, %for.cond.cleanup.loopexit.unr-lcssa, %entry 75 ret void 76 77for.body: ; preds = %for.body, %for.body.preheader.new 78 %indvars.iv = phi i64 [ 0, %for.body.preheader.new ], [ %indvars.iv.next.1, %for.body ] 79 %niter = phi i64 [ 0, %for.body.preheader.new ], [ %niter.next.1, %for.body ] 80 %arrayidx = getelementptr inbounds i32, ptr %a, i64 %indvars.iv 81 %2 = load i32, ptr %arrayidx, align 4 82 %add = add nsw i32 %2, 4 83 store i32 %add, ptr %arrayidx, align 4 84 %indvars.iv.next = or i64 %indvars.iv, 1 85 %arrayidx.1 = getelementptr inbounds i32, ptr %a, i64 %indvars.iv.next 86 %3 = load i32, ptr %arrayidx.1, align 4 87 %add.1 = add nsw i32 %3, 4 88 store i32 %add.1, ptr %arrayidx.1, align 4 89 %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2 90 %niter.next.1 = add i64 %niter, 2 91 %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter 92 br i1 %niter.ncmp.1, label %for.cond.cleanup.loopexit.unr-lcssa, label %for.body 93} 94 95; Make sure we do not change 4294967295 to -1 here. 96define i64 @bug(i32 %x) { 97; CHECK-LABEL: @bug( 98; CHECK-NEXT: [[A:%.*]] = sext i32 [[X:%.*]] to i64 99; CHECK-NEXT: [[B:%.*]] = and i64 [[A]], 4294967295 100; CHECK-NEXT: ret i64 [[B]] 101; 102 %a = sext i32 %x to i64 103 %b = and i64 %a, 4294967295 104 ret i64 %b 105} 106