; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt -S -passes=loop-reroll %s | FileCheck %s declare i32 @goo(i32, i32) @buf = external global ptr @aaa = global [16 x i8] c"\01\02\03\04\05\06\07\08\09\0A\0B\0C\0D\0E\0F\10", align 1 define i32 @test1(i32 %len) { ; CHECK-LABEL: @test1( ; CHECK-NEXT: entry: ; CHECK-NEXT: br label [[WHILE_BODY:%.*]] ; CHECK: while.body: ; CHECK-NEXT: [[INDVAR:%.*]] = phi i64 [ [[INDVAR_NEXT:%.*]], [[WHILE_BODY]] ], [ 0, [[ENTRY:%.*]] ] ; CHECK-NEXT: [[SUM44_020:%.*]] = phi i64 [ 0, [[ENTRY]] ], [ [[ADD:%.*]], [[WHILE_BODY]] ] ; CHECK-NEXT: [[TMP0:%.*]] = trunc i64 [[INDVAR]] to i32 ; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr i8, ptr @aaa, i64 [[INDVAR]] ; CHECK-NEXT: [[TMP1:%.*]] = load i8, ptr [[SCEVGEP]], align 1 ; CHECK-NEXT: [[CONV:%.*]] = zext i8 [[TMP1]] to i64 ; CHECK-NEXT: [[ADD]] = add i64 [[CONV]], [[SUM44_020]] ; CHECK-NEXT: [[INDVAR_NEXT]] = add i64 [[INDVAR]], 1 ; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i32 [[TMP0]], 15 ; CHECK-NEXT: br i1 [[EXITCOND]], label [[WHILE_END:%.*]], label [[WHILE_BODY]] ; CHECK: while.end: ; CHECK-NEXT: [[ADD9_LCSSA:%.*]] = phi i64 [ [[ADD]], [[WHILE_BODY]] ] ; CHECK-NEXT: [[CONV11:%.*]] = trunc i64 [[ADD9_LCSSA]] to i32 ; CHECK-NEXT: [[CALL:%.*]] = tail call i32 @goo(i32 0, i32 [[CONV11]]) ; CHECK-NEXT: unreachable ; entry: br label %while.body while.body: %dec22 = phi i32 [ 4, %entry ], [ %dec, %while.body ] %buf.021 = phi ptr [ @aaa, %entry ], [ %add.ptr, %while.body ] %sum44.020 = phi i64 [ 0, %entry ], [ %add9, %while.body ] %0 = load i8, ptr %buf.021, align 1 %conv = zext i8 %0 to i64 %add = add i64 %conv, %sum44.020 %arrayidx1 = getelementptr inbounds i8, ptr %buf.021, i64 1 %1 = load i8, ptr %arrayidx1, align 1 %conv2 = zext i8 %1 to i64 %add3 = add i64 %add, %conv2 %arrayidx4 = getelementptr inbounds i8, ptr %buf.021, i64 2 %2 = load i8, ptr %arrayidx4, align 1 %conv5 = zext i8 %2 to i64 %add6 = add i64 %add3, %conv5 %arrayidx7 = getelementptr inbounds i8, ptr %buf.021, i64 3 %3 = load i8, ptr %arrayidx7, align 1 %conv8 = zext i8 %3 to i64 %add9 = add i64 %add6, %conv8 %add.ptr = getelementptr inbounds i8, ptr %buf.021, i64 4 %dec = add nsw i32 %dec22, -1 %tobool = icmp eq i32 %dec, 0 br i1 %tobool, label %while.end, label %while.body while.end: ; preds = %while.body %conv11 = trunc i64 %add9 to i32 %call = tail call i32 @goo(i32 0, i32 %conv11) unreachable } define i32 @test2(i32 %N, ptr nocapture readonly %a, i32 %S) { ; CHECK-LABEL: @test2( ; CHECK-NEXT: entry: ; CHECK-NEXT: [[CMP_9:%.*]] = icmp sgt i32 [[N:%.*]], 0 ; CHECK-NEXT: br i1 [[CMP_9]], label [[FOR_BODY_LR_PH:%.*]], label [[FOR_COND_CLEANUP:%.*]] ; CHECK: for.body.lr.ph: ; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[N]], -1 ; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[TMP0]], 1 ; CHECK-NEXT: [[TMP2:%.*]] = shl nuw i32 [[TMP1]], 1 ; CHECK-NEXT: [[TMP3:%.*]] = add nuw nsw i32 [[TMP2]], 1 ; CHECK-NEXT: br label [[FOR_BODY:%.*]] ; CHECK: for.cond.for.cond.cleanup_crit_edge: ; CHECK-NEXT: [[ADD2_LCSSA:%.*]] = phi i32 [ [[ADD:%.*]], [[FOR_BODY]] ] ; CHECK-NEXT: br label [[FOR_COND_CLEANUP]] ; CHECK: for.cond.cleanup: ; CHECK-NEXT: [[S_ADDR_0_LCSSA:%.*]] = phi i32 [ [[ADD2_LCSSA]], [[FOR_COND_FOR_COND_CLEANUP_CRIT_EDGE:%.*]] ], [ [[S:%.*]], [[ENTRY:%.*]] ] ; CHECK-NEXT: ret i32 [[S_ADDR_0_LCSSA]] ; CHECK: for.body: ; CHECK-NEXT: [[INDVAR:%.*]] = phi i64 [ [[INDVAR_NEXT:%.*]], [[FOR_BODY]] ], [ 0, [[FOR_BODY_LR_PH]] ] ; CHECK-NEXT: [[S_ADDR_011:%.*]] = phi i32 [ [[S]], [[FOR_BODY_LR_PH]] ], [ [[ADD]], [[FOR_BODY]] ] ; CHECK-NEXT: [[TMP4:%.*]] = trunc i64 [[INDVAR]] to i32 ; CHECK-NEXT: [[TMP5:%.*]] = shl nuw nsw i64 [[INDVAR]], 2 ; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr i8, ptr [[A:%.*]], i64 [[TMP5]] ; CHECK-NEXT: [[TMP6:%.*]] = load i32, ptr [[SCEVGEP]], align 4 ; CHECK-NEXT: [[ADD]] = add nsw i32 [[TMP6]], [[S_ADDR_011]] ; CHECK-NEXT: [[INDVAR_NEXT]] = add i64 [[INDVAR]], 1 ; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i32 [[TMP4]], [[TMP3]] ; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_COND_FOR_COND_CLEANUP_CRIT_EDGE]], label [[FOR_BODY]] ; entry: %cmp.9 = icmp sgt i32 %N, 0 br i1 %cmp.9, label %for.body.lr.ph, label %for.cond.cleanup for.body.lr.ph: br label %for.body for.cond.for.cond.cleanup_crit_edge: br label %for.cond.cleanup for.cond.cleanup: %S.addr.0.lcssa = phi i32 [ %add2, %for.cond.for.cond.cleanup_crit_edge ], [ %S, %entry ] ret i32 %S.addr.0.lcssa for.body: %i.012 = phi i32 [ 0, %for.body.lr.ph ], [ %add3, %for.body ] %S.addr.011 = phi i32 [ %S, %for.body.lr.ph ], [ %add2, %for.body ] %a.addr.010 = phi ptr [ %a, %for.body.lr.ph ], [ %incdec.ptr1, %for.body ] %incdec.ptr = getelementptr inbounds i32, ptr %a.addr.010, i64 1 %0 = load i32, ptr %a.addr.010, align 4 %add = add nsw i32 %0, %S.addr.011 %incdec.ptr1 = getelementptr inbounds i32, ptr %a.addr.010, i64 2 %1 = load i32, ptr %incdec.ptr, align 4 %add2 = add nsw i32 %add, %1 %add3 = add nsw i32 %i.012, 2 %cmp = icmp slt i32 %add3, %N br i1 %cmp, label %for.body, label %for.cond.for.cond.cleanup_crit_edge } define i32 @test3(ptr nocapture readonly %buf, i32 %len) #0 { ; CHECK-LABEL: @test3( ; CHECK-NEXT: entry: ; CHECK-NEXT: [[CMP10:%.*]] = icmp sgt i32 [[LEN:%.*]], 1 ; CHECK-NEXT: br i1 [[CMP10]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]] ; CHECK: while.body.preheader: ; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[LEN]], -2 ; CHECK-NEXT: [[TMP1:%.*]] = lshr i32 [[TMP0]], 1 ; CHECK-NEXT: [[TMP2:%.*]] = shl nuw i32 [[TMP1]], 1 ; CHECK-NEXT: [[TMP3:%.*]] = add nuw nsw i32 [[TMP2]], 1 ; CHECK-NEXT: br label [[WHILE_BODY:%.*]] ; CHECK: while.body: ; CHECK-NEXT: [[INDVAR:%.*]] = phi i64 [ [[INDVAR_NEXT:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_PREHEADER]] ] ; CHECK-NEXT: [[S_012:%.*]] = phi i32 [ [[ADD:%.*]], [[WHILE_BODY]] ], [ undef, [[WHILE_BODY_PREHEADER]] ] ; CHECK-NEXT: [[TMP4:%.*]] = trunc i64 [[INDVAR]] to i32 ; CHECK-NEXT: [[TMP5:%.*]] = mul nsw i64 [[INDVAR]], -4 ; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr i8, ptr [[BUF:%.*]], i64 [[TMP5]] ; CHECK-NEXT: [[TMP6:%.*]] = load i32, ptr [[SCEVGEP]], align 4 ; CHECK-NEXT: [[ADD]] = add nsw i32 [[TMP6]], [[S_012]] ; CHECK-NEXT: [[INDVAR_NEXT]] = add i64 [[INDVAR]], 1 ; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i32 [[TMP4]], [[TMP3]] ; CHECK-NEXT: br i1 [[EXITCOND]], label [[WHILE_END_LOOPEXIT:%.*]], label [[WHILE_BODY]] ; CHECK: while.end.loopexit: ; CHECK-NEXT: [[ADD2_LCSSA:%.*]] = phi i32 [ [[ADD]], [[WHILE_BODY]] ] ; CHECK-NEXT: br label [[WHILE_END]] ; CHECK: while.end: ; CHECK-NEXT: [[S_0_LCSSA:%.*]] = phi i32 [ undef, [[ENTRY:%.*]] ], [ [[ADD2_LCSSA]], [[WHILE_END_LOOPEXIT]] ] ; CHECK-NEXT: ret i32 [[S_0_LCSSA]] ; entry: %cmp10 = icmp sgt i32 %len, 1 br i1 %cmp10, label %while.body.preheader, label %while.end while.body.preheader: ; preds = %entry br label %while.body while.body: ; preds = %while.body.preheader, %while.body %i.013 = phi i32 [ %sub, %while.body ], [ %len, %while.body.preheader ] %S.012 = phi i32 [ %add2, %while.body ], [ undef, %while.body.preheader ] %buf.addr.011 = phi ptr [ %add.ptr, %while.body ], [ %buf, %while.body.preheader ] %0 = load i32, ptr %buf.addr.011, align 4 %add = add nsw i32 %0, %S.012 %arrayidx1 = getelementptr inbounds i32, ptr %buf.addr.011, i64 -1 %1 = load i32, ptr %arrayidx1, align 4 %add2 = add nsw i32 %add, %1 %add.ptr = getelementptr inbounds i32, ptr %buf.addr.011, i64 -2 %sub = add nsw i32 %i.013, -2 %cmp = icmp sgt i32 %sub, 1 br i1 %cmp, label %while.body, label %while.end.loopexit while.end.loopexit: ; preds = %while.body br label %while.end while.end: ; preds = %while.end.loopexit, %entry %S.0.lcssa = phi i32 [ undef, %entry ], [ %add2, %while.end.loopexit ] ret i32 %S.0.lcssa } define i32 @test4(i32 %len) { ; CHECK-LABEL: @test4( ; CHECK-NEXT: entry: ; CHECK-NEXT: br label [[WHILE_BODY:%.*]] ; CHECK: while.body: ; CHECK-NEXT: [[INDVAR:%.*]] = phi i64 [ [[INDVAR_NEXT:%.*]], [[WHILE_BODY]] ], [ 0, [[ENTRY:%.*]] ] ; CHECK-NEXT: [[SUM44_020:%.*]] = phi i64 [ 0, [[ENTRY]] ], [ [[ADD:%.*]], [[WHILE_BODY]] ] ; CHECK-NEXT: [[TMP0:%.*]] = trunc i64 [[INDVAR]] to i32 ; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr i8, ptr @aaa, i64 [[INDVAR]] ; CHECK-NEXT: [[TMP1:%.*]] = load i8, ptr [[SCEVGEP]], align 1 ; CHECK-NEXT: [[CONV:%.*]] = zext i8 [[TMP1]] to i64 ; CHECK-NEXT: [[ADD]] = add i64 [[CONV]], [[SUM44_020]] ; CHECK-NEXT: [[INDVAR_NEXT]] = add i64 [[INDVAR]], 1 ; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i32 [[TMP0]], 23 ; CHECK-NEXT: br i1 [[EXITCOND]], label [[WHILE_END:%.*]], label [[WHILE_BODY]] ; CHECK: while.end: ; CHECK-NEXT: [[ADD9_LCSSA:%.*]] = phi i64 [ [[ADD]], [[WHILE_BODY]] ] ; CHECK-NEXT: [[CONV11:%.*]] = trunc i64 [[ADD9_LCSSA]] to i32 ; CHECK-NEXT: [[CALL:%.*]] = tail call i32 @goo(i32 0, i32 [[CONV11]]) ; CHECK-NEXT: unreachable ; entry: br label %while.body while.body: %a = phi i32 [ 4, %entry ], [ %a.next, %while.body ] %b = phi i32 [ 6, %entry ], [ %b.next, %while.body ] %buf.021 = phi ptr [ @aaa, %entry ], [ %add.ptr, %while.body ] %sum44.020 = phi i64 [ 0, %entry ], [ %add9, %while.body ] %0 = load i8, ptr %buf.021, align 1 %conv = zext i8 %0 to i64 %add = add i64 %conv, %sum44.020 %arrayidx1 = getelementptr inbounds i8, ptr %buf.021, i64 1 %1 = load i8, ptr %arrayidx1, align 1 %conv2 = zext i8 %1 to i64 %add3 = add i64 %add, %conv2 %arrayidx4 = getelementptr inbounds i8, ptr %buf.021, i64 2 %2 = load i8, ptr %arrayidx4, align 1 %conv5 = zext i8 %2 to i64 %add6 = add i64 %add3, %conv5 %arrayidx7 = getelementptr inbounds i8, ptr %buf.021, i64 3 %3 = load i8, ptr %arrayidx7, align 1 %conv8 = zext i8 %3 to i64 %add9 = add i64 %add6, %conv8 %add.ptr = getelementptr inbounds i8, ptr %buf.021, i64 4 %a.next = add nsw i32 %a, -1 %b.next = add nsw i32 %b, -1 %cond = add nsw i32 %a, %b %tobool = icmp eq i32 %cond, 0 br i1 %tobool, label %while.end, label %while.body while.end: ; preds = %while.body %conv11 = trunc i64 %add9 to i32 %call = tail call i32 @goo(i32 0, i32 %conv11) unreachable }